diff --git a/.github/workflows/build-dev-artifacts.yml b/.github/workflows/build-dev-artifacts.yml
index b13dae1b0..61b2c634a 100755
--- a/.github/workflows/build-dev-artifacts.yml
+++ b/.github/workflows/build-dev-artifacts.yml
@@ -28,7 +28,13 @@ jobs:
         run: |
           composer install --no-dev --prefer-dist --no-progress
       - name: Create zip
-        run: npm run dist
+        run: |
+          npm ci
+          CURRENT_VERSION=$(node -p -e "require('./package.json').version")
+          COMMIT_HASH=$(git rev-parse --short HEAD)
+          DEV_VERSION="${CURRENT_VERSION}-dev.${COMMIT_HASH}"
+          npm run grunt version::${DEV_VERSION}
+          npm run dist
       - name: Retrieve branch name
         id: retrieve-branch-name
         run: echo "::set-output name=branch_name::$(REF=${GITHUB_HEAD_REF:-$GITHUB_REF} && echo ${REF#refs/heads/} | sed 's/\//-/g')"
diff --git a/.github/workflows/translations.yml b/.github/workflows/translations.yml
new file mode 100644
index 000000000..b8c2c5f8e
--- /dev/null
+++ b/.github/workflows/translations.yml
@@ -0,0 +1,45 @@
+name: Translations Diff
+
+on:
+  pull_request_review:
+  pull_request:
+    types: [opened, edited, synchronize, ready_for_review]
+    branches:
+      - development
+      - master
+
+jobs:
+  translation:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Base Branch
+        uses: actions/checkout@master
+        with:
+          ref: ${{ github.base_ref }}
+          path: visualizer-base
+      - name: Setup node 22
+        uses: actions/setup-node@v6
+        with:
+          node-version: 22.x
+      - name: Checkout PR Branch (Head)
+        uses: actions/checkout@master
+        with:
+          path: visualizer-head
+      - name: Build POT for PR Branch
+        run: |
+          chmod +x ./visualizer-head/bin/make-pot.sh
+          ./visualizer-head/bin/make-pot.sh ./visualizer-head ./visualizer-head/languages/visualizer.pot
+          ls ./visualizer-head/languages/
+      - name: Build POT for Base Branch
+        run: |
+          ./visualizer-head/bin/make-pot.sh ./visualizer-base ./visualizer-base/languages/visualizer.pot
+          ls ./visualizer-base/languages/
+      - name: Compare POT files
+        uses: Codeinwp/action-i18n-string-reviewer@main
+        with:
+          fail-on-changes: "false"
+          openrouter-key: ${{ secrets.OPEN_ROUTER_API_KEY }}
+          openrouter-model: "google/gemini-2.5-flash"
+          base-pot-file: "visualizer-base/languages/visualizer.pot"
+          target-pot-file: "visualizer-head/languages/visualizer.pot"
+          github-token: ${{ secrets.BOT_TOKEN }}
diff --git a/.wp-env.json b/.wp-env.json
index d4d36aa0b..86dd6cef1 100644
--- a/.wp-env.json
+++ b/.wp-env.json
@@ -1,5 +1,5 @@
 {
-  "core": "WordPress/WordPress#6.5.0",
+  "core": null,
   "phpVersion": "7.4",
   "plugins": ["."],
   "themes": [],
diff --git a/AGENTS.md b/AGENTS.md
index 5e9877b11..9dbe23c17 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -34,14 +34,31 @@ npm run dev                         # Watch mode for development
 ```
 
 ### E2E Tests & Environment
+
+Requires Docker to be running. Uses `docker-compose.ci.yml` (MariaDB + WordPress on port 8889).
+
 ```bash
-npm install                         # Install root-level JS dependencies
-npm run test:env:start              # Start wp-env WordPress environment
-npm run test:env:stop               # Stop wp-env
-npm run test:e2e:playwright         # Run Playwright E2E tests
-npm run test:e2e:playwright:debug   # Playwright UI debug mode
+# 1. Install dependencies
+npm ci
+npx playwright install --with-deps chromium
+composer install --no-dev
+
+# 2. Start the WordPress environment (boots Docker, installs WP, activates plugin)
+DOCKER_FILE=docker-compose.ci.yml bash bin/wp-init.sh
+
+# 3. Run the full Playwright suite
+npm run test:e2e:playwright
+
+# 4. Run a single spec file
+npx wp-scripts test-playwright --config tests/e2e/playwright.config.js tests/e2e/specs/gutenberg-editor.spec.js
+
+# 5. Tear down
+DOCKER_FILE=docker-compose.ci.yml bash bin/wp-down.sh
 ```
 
+WordPress is installed at `http://localhost:8889` with credentials `admin` / `password`.
+The `TI_E2E_TESTING` constant is set to `true` in `wp-config.php` by the setup script, which enables test-only code paths in the plugin.
+
 ---
 
 ## Architecture Overview
diff --git a/bin/make-pot.sh b/bin/make-pot.sh
new file mode 100644
index 000000000..af19c5d73
--- /dev/null
+++ b/bin/make-pot.sh
@@ -0,0 +1,47 @@
+#!/bin/bash
+
+# Script to generate POT file via Docker
+# Usage: ./bin/make-pot.sh [plugin-path] [destination-path]
+
+# Set defaults
+PLUGIN_PATH="${1:-.}"
+DESTINATION="${2:-.}"
+
+# Resolve absolute paths
+PLUGIN_PATH="$(cd "$PLUGIN_PATH" 2>/dev/null && pwd)" || {
+    echo "Error: Plugin path '$1' does not exist"
+    exit 1
+}
+
+DESTINATION="$(cd "$(dirname "$DESTINATION")" 2>/dev/null && pwd)/$(basename "$DESTINATION")" || {
+    echo "Error: Unable to resolve destination path"
+    exit 1
+}
+
+# Extract destination filename and directory
+DEST_DIR="$(dirname "$DESTINATION")"
+DEST_FILE="$(basename "$DESTINATION")"
+
+# Ensure destination directory exists
+mkdir -p "$DEST_DIR"
+
+echo "Generating POT file..."
+echo "Plugin Path: $PLUGIN_PATH"
+echo "Destination: $DESTINATION"
+echo ""
+
+# Run Docker container with wp-cli to generate POT
+docker run --user root --rm \
+    --volume "$PLUGIN_PATH:/var/www/html/plugin" \
+    wordpress:cli \
+    bash -c 'php -d memory_limit=512M "$(which wp)" --version --allow-root && wp i18n make-pot plugin ./plugin/languages/'"$DEST_FILE"' --include=admin,includes,libs,assets,views --allow-root --domain=anti-spam'
+
+# Check if the file was created inside the container
+if [ $? -eq 0 ]; then
+    echo ""
+    echo "✓ POT file successfully generated at: $DESTINATION"
+else
+    echo ""
+    echo "✗ Error generating POT file"
+    exit 1
+fi
diff --git a/classes/Visualizer/Gutenberg/Block.php b/classes/Visualizer/Gutenberg/Block.php
index 045819b54..38b479ee9 100644
--- a/classes/Visualizer/Gutenberg/Block.php
+++ b/classes/Visualizer/Gutenberg/Block.php
@@ -186,8 +186,7 @@ public function gutenberg_block_callback( $atts ) {
 			return '';
 		}
 
-		// phpcs:ignore WordPress.PHP.StrictComparisons.LooseComparison
-		if ( $atts['lazy'] == -1 || $atts['lazy'] == false ) {
+		if ( $atts['lazy'] === '-1' || $atts['lazy'] === false ) {
 			$atts['lazy'] = 'no';
 		}
 
@@ -472,11 +471,12 @@ public function get_visualizer_data( $post ) {
 			$permissions = get_post_meta( $post_id, Visualizer_Pro::CF_PERMISSIONS, true );
 
 			if ( empty( $permissions ) ) {
-				$permissions = array( 'permissions' => array(
+				$permissions = array(
+					'permissions' => array(
 						'read'          => 'all',
 						'edit'          => 'roles',
 						'edit-specific' => array( 'administrator' ),
-				),
+					),
 				);
 			}
 
@@ -824,7 +824,7 @@ public function get_permission_data( $data ) {
 					foreach ( $users as $user ) {
 						$options[ $i ]['value'] = $user->ID;
 						$options[ $i ]['label'] = $user->display_name;
-						$i++;
+						++$i;
 					}
 				}
 				break;
@@ -838,7 +838,7 @@ public function get_permission_data( $data ) {
 					foreach ( get_editable_roles() as $name => $info ) {
 						$options[ $i ]['value'] = $name;
 						$options[ $i ]['label'] = $name;
-						$i++;
+						++$i;
 					}
 				}
 				break;
@@ -874,7 +874,7 @@ public function add_rest_query_vars( $args, \WP_REST_Request $request ) {
 	 * @param mixed $value The value to sanitize.
 	 * @return mixed Sanitized value.
 	 */
-	private function sanitize_value( $value ) {
+	public function sanitize_value( $value ) {
 		if ( is_string( $value ) ) {
 			return sanitize_text_field( $value );
 		}
diff --git a/classes/Visualizer/Module.php b/classes/Visualizer/Module.php
index 8ef678c16..9762a56e2 100644
--- a/classes/Visualizer/Module.php
+++ b/classes/Visualizer/Module.php
@@ -68,8 +68,7 @@ public function __construct( Visualizer_Plugin $plugin ) {
 		$this->_addFilter( Visualizer_Plugin::FILTER_HANDLE_REVISIONS, 'handleExistingRevisions', 10, 2 );
 		$this->_addFilter( Visualizer_Plugin::FILTER_GET_CHART_DATA_AS, 'getDataAs', 10, 3 );
 		$this->_addAction( 'pre_get_posts', 'PreGetPosts' );
-		register_shutdown_function( array($this, 'onShutdown') );
-
+		register_shutdown_function( array( $this, 'onShutdown' ) );
 	}
 
 	/**
@@ -114,16 +113,16 @@ protected function _addAction( $tag, $method, $methodClass = null, $priority = 1
 	 * @param string  $tag The name of the AJAX action to which the $method is hooked.
 	 * @param string  $method Optional. The name of the method to be called. If the name of the method is not provided, tag name will be used as method name.
 	 * @param bool    $methodClass The root of the method.
-	 * @param boolean $private Optional. Determines if we should register hook for logged in users.
-	 * @param boolean $public Optional. Determines if we should register hook for not logged in users.
+	 * @param boolean $logged_in Optional. Determines if we should register hook for logged in users.
+	 * @param boolean $logged_out Optional. Determines if we should register hook for not logged in users.
 	 * @return Visualizer_Module
 	 */
-	protected function _addAjaxAction( $tag, $method = '', $methodClass = null, $private = true, $public = false ) {
-		if ( $private ) {
+	protected function _addAjaxAction( $tag, $method = '', $methodClass = null, $logged_in = true, $logged_out = false ) {
+		if ( $logged_in ) {
 			$this->_addAction( 'wp_ajax_' . $tag, $method, $methodClass );
 		}
 
-		if ( $public ) {
+		if ( $logged_out ) {
 			$this->_addAction( 'wp_ajax_nopriv_' . $tag, $method, $methodClass );
 		}
 
@@ -169,7 +168,7 @@ protected function _addShortcode( $tag, $method ) {
 	 *
 	 * @since 3.2.0
 	 */
-	public function getDataAs( $final, $chart_id, $type ) {
+	public function getDataAs( $data, $chart_id, $type ) {
 		return $this->_getDataAs( $chart_id, $type );
 	}
 
@@ -270,12 +269,15 @@ private function _getCSV( $rows, $filename, $enclose ) {
 		$bom = chr( 0xEF ) . chr( 0xBB ) . chr( 0xBF );
 		// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
 		$fp = function_exists( 'tmpfile' ) ? @tmpfile() : null;
-		if ( null === $fp ) {
+		if ( ! $fp ) {
 			if ( ! function_exists( 'wp_tempnam' ) ) {
 				require_once ABSPATH . 'wp-admin/includes/file.php';
 			}
 			$fp = fopen( wp_tempnam(), 'w+' );
 		}
+		if ( ! $fp ) {
+			return array( 'csv' => '', 'name' => $filename, 'string' => '' );
+		}
 		if ( ! apply_filters( 'vizualizer_export_include_series_type', true ) ) {
 			unset( $rows[1] );
 			$rows = array_values( $rows );
@@ -287,8 +289,8 @@ private function _getCSV( $rows, $filename, $enclose ) {
 		}
 		rewind( $fp );
 		$csv = '';
-		// phpcs:ignore WordPress.CodeAnalysis.AssignmentInCondition.FoundInWhileCondition
-		while ( ( $array = fgetcsv( $fp ) ) !== false ) {
+		$array = fgetcsv( $fp );
+		while ( $array !== false ) {
 			if ( strlen( $csv ) > 0 ) {
 				$csv .= PHP_EOL;
 			}
@@ -304,7 +306,8 @@ private function _getCSV( $rows, $filename, $enclose ) {
 				}
 				$array = $temp_array;
 			}
-			$csv .= implode( ',', $array );
+			$csv  .= implode( ',', $array );
+			$array = fgetcsv( $fp );
 		}
 		fclose( $fp );
 
@@ -330,7 +333,7 @@ private function _getExcel( $rows, $filename ) {
 			unset( $rows[1] );
 			$rows = array_values( $rows );
 			$rows = array_map(
-				function( $r ) {
+				function ( $r ) {
 					return array_map( 'strval', $r );
 				},
 				$rows
@@ -402,7 +405,7 @@ private function _getHTML( $rows ) {
 		foreach ( $rows as $row ) {
 			// skip the data type row.
 			if ( 1 === $index ) {
-				$index++;
+				++$index;
 				continue;
 			}
 
@@ -415,7 +418,7 @@ private function _getHTML( $rows ) {
 				}
 			}
 			$table  .= '</tr>';
-			$index++;
+			++$index;
 		}
 		$table      .= '</table>';
 
@@ -430,9 +433,9 @@ private function _getHTML( $rows ) {
 	/**
 	 * Disable revisions temporarily for visualizer post type.
 	 */
-	protected final function disableRevisionsTemporarily() {
+	final protected function disableRevisionsTemporarily() {
 		add_filter(
-			'wp_revisions_to_keep', function( $num, $post ) {
+			'wp_revisions_to_keep', function ( $num, $post ) {
 				if ( $post->post_type === Visualizer_Plugin::CPT_VISUALIZER ) {
 					return 0;
 				}
@@ -446,7 +449,7 @@ protected final function disableRevisionsTemporarily() {
 	 *
 	 * @return bool If any revisions were found.
 	 */
-	public final function undoRevisions( $chart_id, $restore = false ) {
+	final public function undoRevisions( $chart_id, $restore = false ) {
 		do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'undoRevisions for %d with%s restore', $chart_id, ( $restore ? '' : 'out' ) ), 'debug', __FILE__, __LINE__ );
 		if ( get_post_type( $chart_id ) !== Visualizer_Plugin::CPT_VISUALIZER ) {
 			return false;
@@ -478,7 +481,7 @@ public final function undoRevisions( $chart_id, $restore = false ) {
 	/**
 	 * If existing revisions exist for the chart, restore the earliest version and then create a new revision to initiate editing.
 	 */
-	public final function handleExistingRevisions( $chart_id, $chart ) {
+	final public function handleExistingRevisions( $chart_id, $chart ) {
 
 		do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'handleExistingRevisions for %d', $chart_id ), 'debug', __FILE__, __LINE__ );
 		if ( get_post_type( $chart_id ) !== Visualizer_Plugin::CPT_VISUALIZER ) {
@@ -529,50 +532,53 @@ protected function get_user_customization_js() {
 			return $default;
 		}
 
-		require_once( ABSPATH . 'wp-admin/includes/file.php' );
-		WP_Filesystem();
-		global $wp_filesystem;
-		if ( ! is_a( $wp_filesystem, 'WP_Filesystem_Base' ) ) {
-			$creds = request_filesystem_credentials( site_url() );
-			wp_filesystem( $creds );
-		}
-
-		$multisite_arg = '/';
-		if ( is_multisite() && ! is_main_site() ) {
-			$multisite_arg = '/sites/' . get_current_blog_id() . '/';
-		}
+		try {
+			require_once ABSPATH . 'wp-admin/includes/file.php';
+			WP_Filesystem();
+			global $wp_filesystem;
+			if ( ! is_a( $wp_filesystem, 'WP_Filesystem_Base' ) ) {
+				return $default;
+			}
 
-		$dir    = $wp_filesystem->wp_content_dir() . 'uploads' . $multisite_arg . 'visualizer';
-		$file   = $wp_filesystem->wp_content_dir() . 'uploads' . $multisite_arg . 'visualizer/customization.js';
+			$multisite_arg = '/';
+			if ( is_multisite() && ! is_main_site() ) {
+				$multisite_arg = '/sites/' . get_current_blog_id() . '/';
+			}
 
-		if ( $wp_filesystem->is_readable( $file ) ) {
-			return $specific;
-		}
+			$dir    = $wp_filesystem->wp_content_dir() . 'uploads' . $multisite_arg . 'visualizer';
+			$file   = $wp_filesystem->wp_content_dir() . 'uploads' . $multisite_arg . 'visualizer/customization.js';
 
-		if ( $wp_filesystem->exists( $file ) && ! $wp_filesystem->is_readable( $file ) ) {
-			do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'Unable to read file %s', $file ), 'error', __FILE__, __LINE__ );
-			return $default;
-		}
+			if ( $wp_filesystem->is_readable( $file ) ) {
+				return $specific;
+			}
 
-		if ( ! $wp_filesystem->exists( $dir ) ) {
-			// phpcs:ignore WordPress.CodeAnalysis.AssignmentInCondition.Found
-			if ( ( $done = $wp_filesystem->mkdir( $dir ) ) === false ) {
-				do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'Unable to create directory %s', $dir ), 'error', __FILE__, __LINE__ );
+			if ( $wp_filesystem->exists( $file ) && ! $wp_filesystem->is_readable( $file ) ) {
+				do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'Unable to read file %s', $file ), 'error', __FILE__, __LINE__ );
 				return $default;
 			}
-		}
 
-		// if file does not exist, copy.
-		if ( ! $wp_filesystem->exists( $file ) ) {
-			$src    = str_replace( ABSPATH, $wp_filesystem->abspath(), VISUALIZER_ABSPATH . '/js/customization.js' );
-			// phpcs:ignore WordPress.CodeAnalysis.AssignmentInCondition.Found
-			if ( ( $done = $wp_filesystem->copy( $src, $file ) ) === false ) {
-				do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'Unable to copy file %s to %s', $src, $file ), 'error', __FILE__, __LINE__ );
-				return $default;
+			if ( ! $wp_filesystem->exists( $dir ) ) {
+				$done = $wp_filesystem->mkdir( $dir );
+				if ( $done === false ) {
+					do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'Unable to create directory %s', $dir ), 'error', __FILE__, __LINE__ );
+					return $default;
+				}
+			}
+
+			// if file does not exist, copy.
+			if ( ! $wp_filesystem->exists( $file ) ) {
+				$src  = str_replace( ABSPATH, $wp_filesystem->abspath(), VISUALIZER_ABSPATH . '/js/customization.js' );
+				$done = $wp_filesystem->copy( $src, $file );
+				if ( $done === false ) {
+					do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'Unable to copy file %s to %s', $src, $file ), 'error', __FILE__, __LINE__ );
+					return $default;
+				}
 			}
-		}
 
-		return $specific;
+			return $specific;
+		} catch ( \Throwable $e ) {
+			return $default;
+		}
 	}
 
 	/**
@@ -582,10 +588,7 @@ protected function load_chart_type( $chart_id ) {
 		$name   = $this->load_chart_class_name( $chart_id );
 		$class  = null;
 		if ( class_exists( $name ) || true === apply_filters( 'visualizer_load_chart', false, $name ) ) {
-			if ( 'Visualizer_Render_Sidebar_Type_DataTable_DataTable' === $name ) {
-				$name = 'Visualizer_Render_Sidebar_Type_DataTable_Tabular';
-			}
-			$class  = new $name;
+			$class  = new $name();
 		}
 
 		if ( is_null( $class ) && Visualizer_Module::is_pro() ) {
@@ -746,7 +749,7 @@ public static function can_show_feature( $feature ) {
 	/**
 	 * Gets the features for the provided license type.
 	 */
-	public static final function get_features_for_license( $plan ) {
+	final public static function get_features_for_license( $plan ) {
 		$is_new_personal = apply_filters( 'visualizer_is_new_personal', false );
 		switch ( $plan ) {
 			case 1:
diff --git a/classes/Visualizer/Module/AMP.php b/classes/Visualizer/Module/AMP.php
index b9b3a079a..9b5977140 100644
--- a/classes/Visualizer/Module/AMP.php
+++ b/classes/Visualizer/Module/AMP.php
@@ -100,5 +100,4 @@ public function get_chart( $chart, $data, $series, $settings ) {
 		}
 		return $output['csv'];
 	}
-
 }
diff --git a/classes/Visualizer/Module/Admin.php b/classes/Visualizer/Module/Admin.php
index 2c02da8d0..02a3f16db 100644
--- a/classes/Visualizer/Module/Admin.php
+++ b/classes/Visualizer/Module/Admin.php
@@ -96,7 +96,6 @@ public function __construct( Visualizer_Plugin $plugin ) {
 		if ( defined( 'TI_E2E_TESTING' ) ) {
 			$this->load_cypress_hooks();
 		}
-
 	}
 	/**
 	 * Display review notice.
@@ -104,7 +103,7 @@ public function __construct( Visualizer_Plugin $plugin ) {
 	public function render_review_notice( $footer_text ) {
 		$current_screen = get_current_screen();
 
-		$visualizer_page_ids = ['toplevel_page_visualizer', 'visualizer_page_viz-support', 'visualizer_page_ti-about-visualizer' ];
+		$visualizer_page_ids = array( 'toplevel_page_visualizer', 'visualizer_page_viz-support', 'visualizer_page_ti-about-visualizer' );
 
 		if ( ! empty( $current_screen ) && isset( $current_screen->id ) ) {
 			foreach ( $visualizer_page_ids as $page_to_check ) {
@@ -134,7 +133,7 @@ public function render_review_notice( $footer_text ) {
 	private function load_cypress_hooks() {
 		// all charts should load on the same page without pagination.
 		add_filter(
-			'visualizer_query_args', function( $args ) {
+			'visualizer_query_args', function ( $args ) {
 				$args['posts_per_page'] = 20;
 				return $args;
 			}, 10, 1
@@ -253,8 +252,7 @@ public function restoreRevision( $post_id, $revision_id ) {
 	 * @access  public
 	 */
 	public function init() {
-		// phpcs:ignore WordPress.PHP.StrictComparisons.LooseComparison
-		if ( current_user_can( 'edit_posts' ) && current_user_can( 'edit_pages' ) && 'true' == get_user_option( 'rich_editing' ) ) {
+		if ( current_user_can( 'edit_posts' ) && current_user_can( 'edit_pages' ) && 'true' === get_user_option( 'rich_editing' ) ) {
 			$this->_addFilter( 'mce_external_languages', 'add_tinymce_lang', 10, 1 );
 			$this->_addFilter( 'mce_external_plugins', 'tinymce_plugin', 10, 1 );
 			$this->_addFilter( 'mce_buttons', 'register_mce_button', 10, 1 );
@@ -268,7 +266,7 @@ public function init() {
 	 * @since   ?
 	 * @access  friendly
 	 */
-	function get_strings_for_block( $settings ) {
+	public function get_strings_for_block( $settings ) {
 		$class = new Visualizer_Module_Language();
 		$strings         = $class->get_strings();
 		$array = array( 'visualizer_tinymce_plugin' => json_encode( $strings ) );
@@ -797,7 +795,7 @@ public function handleGetProSubMenu() {
 	/**
 	 * Adds the screen options for pagination.
 	 */
-	function addScreenOptions() {
+	public function addScreenOptions() {
 		$screen = get_current_screen();
 
 		// bail if it's some other page.
@@ -816,7 +814,7 @@ function addScreenOptions() {
 	/**
 	 * Returns the screen option for pagination.
 	 */
-	function setScreenOptions( $status, $option, $value ) {
+	public function setScreenOptions( $status, $option, $value ) {
 		if ( 'visualizer_library_per_page' === $option ) {
 			return $value;
 		}
diff --git a/classes/Visualizer/Module/Chart.php b/classes/Visualizer/Module/Chart.php
index e31133b1a..4c5038b6b 100644
--- a/classes/Visualizer/Module/Chart.php
+++ b/classes/Visualizer/Module/Chart.php
@@ -70,7 +70,6 @@ public function __construct( Visualizer_Plugin $plugin ) {
 		$this->_addAjaxAction( Visualizer_Plugin::ACTION_SAVE_FILTER_QUERY, 'saveFilter' );
 
 		$this->_addFilter( 'visualizer_get_sidebar', 'getSidebar', 10, 2 );
-
 	}
 
 	/**
@@ -539,7 +538,8 @@ public function renderChartPages() {
 		if ( ! empty( $_POST ) ) {
 			$_POST = map_deep( $_POST, 'wp_strip_all_tags' );
 		}
-		if ( ! $chart_id || ! ( $chart = get_post( $chart_id ) ) || $chart->post_type !== Visualizer_Plugin::CPT_VISUALIZER ) {
+		$chart = $chart_id ? get_post( $chart_id ) : null;
+		if ( ! $chart_id || ! $chart || $chart->post_type !== Visualizer_Plugin::CPT_VISUALIZER ) {
 			if ( empty( $_GET['lang'] ) || empty( $_GET['parent_chart_id'] ) ) {
 				$this->deleteOldCharts();
 				$default_type = isset( $_GET['type'] ) && ! empty( $_GET['type'] ) ? $_GET['type'] : 'line';
@@ -738,7 +738,7 @@ private function loadCodeEditorAssets( $chart_id ) {
 			wp_register_script( 'visualizer-codemirror-closebrackets', '//codemirror.net/addon/edit/closebrackets.js', array( 'visualizer-codemirror-core' ), Visualizer_Plugin::VERSION );
 			wp_register_script( 'visualizer-codemirror-sql', '//codemirror.net/mode/sql/sql.js', array( 'visualizer-codemirror-core' ), Visualizer_Plugin::VERSION );
 			wp_register_script( 'visualizer-codemirror-sql-hint', '//codemirror.net/addon/hint/sql-hint.js', array( 'visualizer-codemirror-core' ), Visualizer_Plugin::VERSION );
-			wp_register_script( 'visualizer-codemirror-hint', '//codemirror.net/addon/hint/show-hint.js', array(  'visualizer-codemirror-sql', 'visualizer-codemirror-sql-hint', 'visualizer-codemirror-placeholder', 'visualizer-codemirror-matchbrackets', 'visualizer-codemirror-closebrackets' ), Visualizer_Plugin::VERSION );
+			wp_register_script( 'visualizer-codemirror-hint', '//codemirror.net/addon/hint/show-hint.js', array( 'visualizer-codemirror-sql', 'visualizer-codemirror-sql-hint', 'visualizer-codemirror-placeholder', 'visualizer-codemirror-matchbrackets', 'visualizer-codemirror-closebrackets' ), Visualizer_Plugin::VERSION );
 			wp_register_style( 'visualizer-codemirror-core', '//codemirror.net/lib/codemirror.css', array(), Visualizer_Plugin::VERSION );
 			wp_register_style( 'visualizer-codemirror-hint', '//codemirror.net/addon/hint/show-hint.css', array( 'visualizer-codemirror-core' ), Visualizer_Plugin::VERSION );
 
@@ -862,10 +862,8 @@ private function _handleDataAndSettingsPage() {
 				array(
 					'ajax'      => array(
 						'url'     => admin_url( 'admin-ajax.php' ),
-						'nonces'  => array(
-						),
-						'actions' => array(
-						),
+						'nonces'  => array(),
+						'actions' => array(),
 					),
 				)
 			);
@@ -878,12 +876,13 @@ private function _handleDataAndSettingsPage() {
 			'visualizer',
 			array(
 				'l10n'   => array(
-					'invalid_source' => esc_html__( 'You have entered an invalid URL. Please provide a valid URL.', 'visualizer' ),
-					'loading'        => esc_html__( 'Loading...', 'visualizer' ),
-					'json_error'     => esc_html__( 'An error occured in fetching data.', 'visualizer' ),
-					'select_columns' => esc_html__( 'Please select a few columns to include in the chart.', 'visualizer' ),
-					'save_settings'  => __( 'You have modified the chart\'s settings. To modify the source/data again, you must save this chart and reopen it for editing. If you continue without saving the chart, you may lose your changes.', 'visualizer' ),
-					'copied'         => __( 'The data has been copied to your clipboard. Hit Ctrl-V/Cmd-V in your spreadsheet editor to paste the data.', 'visualizer' ),
+					'invalid_source'  => esc_html__( 'You have entered an invalid URL. Please provide a valid URL.', 'visualizer' ),
+					'loading'         => esc_html__( 'Loading...', 'visualizer' ),
+					'json_error'      => esc_html__( 'An error occured in fetching data.', 'visualizer' ),
+					'select_columns'  => esc_html__( 'Please select a few columns to include in the chart.', 'visualizer' ),
+					'save_settings'   => __( 'You have modified the chart\'s settings. To modify the source/data again, you must save this chart and reopen it for editing. If you continue without saving the chart, you may lose your changes.', 'visualizer' ),
+					'copied'          => __( 'The data has been copied to your clipboard. Hit Ctrl-V/Cmd-V in your spreadsheet editor to paste the data.', 'visualizer' ),
+					'invalid_format'  => esc_html__( 'This format pattern is not supported in the series settings field. Use the Manual Configuration option instead.', 'visualizer' ),
 				),
 				'charts' => array(
 					'canvas' => $data,
@@ -1028,7 +1027,7 @@ private function handleCSVasString( $data, $editor_type ) {
 						}
 						$row = explode( ',', $row );
 						$row = array_map(
-							function( $r ) {
+							function ( $r ) {
 								return '' === $r ? ' ' : $r;
 							},
 							$row
@@ -1079,7 +1078,7 @@ private function handleTabularData() {
 			if ( empty( $type ) ) {
 				$exclude[] = $index;
 			}
-			$index++;
+			++$index;
 		}
 
 		// when N headers are being renamed, the number of headers increases by N
@@ -1156,9 +1155,10 @@ public function uploadData() {
 		// check chart, if chart exists
 		// do not use filter_input as it does not work for phpunit test cases, use filter_var instead
 		$chart_id = isset( $_GET['chart'] ) ? filter_var( $_GET['chart'], FILTER_VALIDATE_INT ) : '';
+		$chart    = $chart_id ? get_post( $chart_id ) : null;
 		if (
 			! $chart_id ||
-			! ( $chart = get_post( $chart_id ) ) ||
+			! $chart ||
 			$chart->post_type !== Visualizer_Plugin::CPT_VISUALIZER ||
 			! current_user_can( 'edit_post', $chart_id )
 		) {
@@ -1214,8 +1214,7 @@ public function uploadData() {
 			if ( isset( $_POST['vz-import-time'] ) ) {
 				apply_filters( 'visualizer_pro_chart_schedule', $chart_id, $remote_data, $_POST['vz-import-time'] );
 			}
-			// phpcs:ignore WordPress.PHP.StrictComparisons.LooseComparison
-		} elseif ( isset( $_FILES['local_data'] ) && $_FILES['local_data']['error'] == 0 ) {
+		} elseif ( isset( $_FILES['local_data'] ) && $_FILES['local_data']['error'] === 0 ) {
 			$source = new Visualizer_Source_Csv( $_FILES['local_data']['tmp_name'] );
 		} elseif ( isset( $_POST['chart_data'] ) && strlen( $_POST['chart_data'] ) > 0 ) {
 			$source = $this->handleCSVasString( $_POST['chart_data'], $_POST['editor-type'] );
@@ -1407,7 +1406,8 @@ private function _handleDataPage() {
 			array(
 				'l10n'   => array(
 					'invalid_source' => esc_html__( 'You have entered an invalid URL. Please provide a valid URL.', 'visualizer' ),
-					'loading'       => esc_html__( 'Loading...', 'visualizer' ),
+					'loading'        => esc_html__( 'Loading...', 'visualizer' ),
+					'invalid_format' => esc_html__( 'This format pattern is not supported in the series settings field. To display percentages, use the Manual Configuration option instead.', 'visualizer' ),
 				),
 				'charts' => array(
 					'canvas' => $data,
diff --git a/classes/Visualizer/Module/Frontend.php b/classes/Visualizer/Module/Frontend.php
index c8cb044bc..1905165e6 100644
--- a/classes/Visualizer/Module/Frontend.php
+++ b/classes/Visualizer/Module/Frontend.php
@@ -87,7 +87,7 @@ public function __construct( Visualizer_Plugin $plugin ) {
 	/**
 	 * Adds the async attribute to certain scripts.
 	 */
-	function script_loader_tag( $tag, $handle, $src ) {
+	public function script_loader_tag( $tag, $handle, $src ) {
 		if ( is_admin() ) {
 			return $tag;
 		}
@@ -98,7 +98,7 @@ function script_loader_tag( $tag, $handle, $src ) {
 				$tag = str_replace( ' src', ' async src', $tag );
 				break;
 			}
-		};
+		}
 
 		// Async scripts.
 		$scripts = array( 'dom-to-image' );
@@ -124,7 +124,7 @@ function script_loader_tag( $tag, $handle, $src ) {
 	/**
 	 * Returns the language/locale.
 	 */
-	function getLanguage( $dummy, $only_language ) {
+	public function getLanguage( $dummy, $only_language ) {
 		return $this->get_language();
 	}
 
@@ -132,7 +132,7 @@ function getLanguage( $dummy, $only_language ) {
 	/**
 	 * Registers the endpoints
 	 */
-	function endpoint_register() {
+	public function endpoint_register() {
 		register_rest_route(
 			'visualizer/v' . VISUALIZER_REST_VERSION,
 			'/action/(?P<chart>\d+)/(?P<type>.+)/',
@@ -142,7 +142,7 @@ function endpoint_register() {
 				'args'     => array(
 					'chart' => array(
 						'required' => true,
-						'sanitize_callback' => function( $param ) {
+						'sanitize_callback' => function ( $param ) {
 							return is_numeric( $param ) ? $param : null;
 						},
 					),
@@ -342,8 +342,8 @@ public function renderChart( $atts ) {
 		}
 
 		// in case revisions exist.
-		// phpcs:ignore WordPress.CodeAnalysis.AssignmentInCondition.Found
-		if ( true === ( $revisions = $this->undoRevisions( $chart->ID, true ) ) ) {
+		$revisions = $this->undoRevisions( $chart->ID, true );
+		if ( true === $revisions ) {
 			$chart = get_post( $chart->ID );
 		}
 
@@ -509,7 +509,7 @@ public function renderChart( $atts ) {
 					)
 				);
 			}
-			$count++;
+			++$count;
 		}
 		$prefix = 'C' . 'h' . 'a' . 'rt';
 		if ( $type === 'tabular' ) {
diff --git a/classes/Visualizer/Module/Language.php b/classes/Visualizer/Module/Language.php
index cfaafdac2..38239a644 100644
--- a/classes/Visualizer/Module/Language.php
+++ b/classes/Visualizer/Module/Language.php
@@ -19,7 +19,7 @@
  */
 
 if ( ! class_exists( '_WP_Editors' ) ) {
-	require( ABSPATH . WPINC . '/class-wp-editor.php' );
+	require ABSPATH . WPINC . '/class-wp-editor.php';
 }
 
 /**
@@ -79,7 +79,6 @@ public function tinymce_translation() {
 	public function get_strings() {
 		return $this->strings;
 	}
-
 }
 
 $visualizerLangClass = new Visualizer_Module_Language();
diff --git a/classes/Visualizer/Module/Sources.php b/classes/Visualizer/Module/Sources.php
index 8d93e2920..b279d5f46 100644
--- a/classes/Visualizer/Module/Sources.php
+++ b/classes/Visualizer/Module/Sources.php
@@ -53,7 +53,7 @@ public function __construct( Visualizer_Plugin $plugin ) {
 		parent::__construct( $plugin );
 		$this->_addFilter( Visualizer_Plugin::FILTER_GET_CHART_SERIES, 'filterChartSeries', 1, 2 );
 		$this->_addFilter( Visualizer_Plugin::FILTER_GET_CHART_DATA, 'filterChartData', 1, 2 );
-		$this->_addFilter( 'visualizer_pro_upsell', 'addProUpsell', 10, 2 );
+		$this->_addFilter( 'visualizer_pro_upsell', 'addProUpsell', 10, 3 );
 	}
 
 	/**
@@ -129,7 +129,7 @@ public function filterChartData( $data, $chart_id ) {
 	 *
 	 * @return string The new html code.
 	 */
-	public function addProUpsell( $old, $feature = null ) {
+	public function addProUpsell( $old, $feature = null, string $docs_url = '' ) {
 		$pro_features   = Visualizer_Module::get_features_for_license( 1 );
 		$biz_features   = Visualizer_Module::get_features_for_license( 2 );
 		$return  = '';
@@ -145,7 +145,7 @@ public function addProUpsell( $old, $feature = null ) {
 			if ( in_array( $feature, $biz_features, true ) && Visualizer_Module::is_pro() ) {
 				$msg = $plus_msg;
 			}
-			if ( in_array( $feature, [ 'db-query', 'chart-permissions' ], true ) ) {
+			if ( in_array( $feature, array( 'db-query', 'chart-permissions' ), true ) ) {
 				$msg = $plus_msg;
 			}
 
@@ -153,7 +153,10 @@ public function addProUpsell( $old, $feature = null ) {
 			$return .= '	<div class="only-pro-container">';
 			$return .= '		<div class="only-pro-inner">';
 			$return .= '			<p>' . $msg . '</p>';
-			$return .= '            <a target="_blank" href="' . tsdk_utmify( Visualizer_Plugin::PRO_TEASER_URL, esc_attr( $feature ) ) . '" title="' . __( 'Upgrade Now', 'visualizer' ) . '">' . __( 'Upgrade Now', 'visualizer' ) . '</a>';
+			if ( ! empty( $docs_url ) ) {
+				$return .= '            <a target="_blank" href="' . esc_url( $docs_url ) . '" class="button button-secondary">' . esc_html__( 'Documentation', 'visualizer' ) . '</a>';
+			}
+			$return .= '            <a target="_blank" href="' . tsdk_utmify( Visualizer_Plugin::PRO_TEASER_URL, esc_attr( $feature ) ) . '" title="' . __( 'Upgrade Now', 'visualizer' ) . '" class="button button-primary">' . __( 'Upgrade Now', 'visualizer' ) . '</a>';
 			$return .= ' 		</div>';
 			$return .= ' 	</div>';
 			$return .= '</div>';
@@ -165,5 +168,4 @@ public function addProUpsell( $old, $feature = null ) {
 
 		return $return;
 	}
-
 }
diff --git a/classes/Visualizer/Module/Upgrade.php b/classes/Visualizer/Module/Upgrade.php
index 630dafe12..5bf975b60 100644
--- a/classes/Visualizer/Module/Upgrade.php
+++ b/classes/Visualizer/Module/Upgrade.php
@@ -71,6 +71,5 @@ private static function makeAllTableChartsTabular() {
 			AND pm.meta_value IN ( 'dataTable', 'table' )"
 		);
 		// phpcs:enable WordPress.DB.PreparedSQL.NotPrepared
-
 	}
 }
diff --git a/classes/Visualizer/Plugin.php b/classes/Visualizer/Plugin.php
index 62f6724e9..85cbfd425 100644
--- a/classes/Visualizer/Plugin.php
+++ b/classes/Visualizer/Plugin.php
@@ -222,10 +222,10 @@ public function hasModule( $name ) {
 	 *
 	 * @access public
 	 *
-	 * @param string $class The name of the module to use in the plugin.
+	 * @param string $class_name The name of the module to use in the plugin.
 	 */
-	public function setModule( $class ) {
-		$this->_modules[ $class ] = new $class( $this );
+	public function setModule( $class_name ) {
+		$this->_modules[ $class_name ] = new $class_name( $this );
 	}
 
 	/**
@@ -241,11 +241,10 @@ private function __clone() {
 	/**
 	 * For local testing, overrides the 'themeisle_log_event' hook and redirects to error.log.
 	 */
-	final function themeisle_log_event_debug( $name, $message, $type, $file, $line ) {
+	final public function themeisle_log_event_debug( $name, $message, $type, $file, $line ) {
 		if ( Visualizer_Plugin::NAME !== $name ) {
 			return;
 		}
 		error_log( sprintf( '%s (%s): %s in %s:%s', $name, $type, $message, $file, $line ) );
 	}
-
 }
diff --git a/classes/Visualizer/Render.php b/classes/Visualizer/Render.php
index bcb036fce..93b51bf30 100644
--- a/classes/Visualizer/Render.php
+++ b/classes/Visualizer/Render.php
@@ -112,7 +112,7 @@ public function __unset( $name ) {
 	 * @abstract
 	 * @access protected
 	 */
-	protected abstract function _toHTML();
+	abstract protected function _toHTML();
 
 	/**
 	 * Builds template and return it as string.
@@ -215,6 +215,4 @@ protected function can_chart_have_action( $action, $chart_id = null ) {
 
 		return true;
 	}
-
-
 }
diff --git a/classes/Visualizer/Render/Layout.php b/classes/Visualizer/Render/Layout.php
index a89353ef5..d2cd516c6 100644
--- a/classes/Visualizer/Render/Layout.php
+++ b/classes/Visualizer/Render/Layout.php
@@ -390,7 +390,6 @@ public static function _renderSimpleEditorScreen( $args ) {
 
 			</div>
 		<?php
-
 	}
 
 	/**
@@ -617,7 +616,7 @@ private static function _renderPermissions( $args ) {
 					array( 'visualizer-permission', 'visualizer-permission-specific', 'visualizer-permission-edit-specific' )
 				);
 			Visualizer_Render_Sidebar::_renderSectionEnd();
-			echo apply_filters( 'visualizer_pro_upsell', '', 'chart-permissions' );
+			echo apply_filters( 'visualizer_pro_upsell', '', 'chart-permissions', 'https://docs.themeisle.com/article/1280-how-to-customize-permissions' );
 			echo '</div>';
 		Visualizer_Render_Sidebar::_renderGroupEnd();
 	}
@@ -787,20 +786,20 @@ public static function _renderTabBasic( $args ) {
 											</p>
 											<input type="button" id="editor-undo" class="button button-secondary" style="display: none" value="<?php _e( 'Undo Changes', 'visualizer' ); ?>">
 											<input type="button" id="editor-button" class="button button-primary "
-												   value="<?php _e( 'Edit Data', 'visualizer' ); ?>" data-current="chart"
-												   data-t-editor="<?php _e( 'Show Chart', 'visualizer' ); ?>"
-												   data-t-chart="<?php _e( 'Edit Data', 'visualizer' ); ?>"
+													value="<?php _e( 'Edit Data', 'visualizer' ); ?>" data-current="chart"
+													data-t-editor="<?php _e( 'Show Chart', 'visualizer' ); ?>"
+													data-t-chart="<?php _e( 'Edit Data', 'visualizer' ); ?>"
 											>
-											<p class="viz-group-description viz-info-msg"><?php echo sprintf( __( 'Please make sure you click \'Show Chart\' before you save the chart.', 'visualizer' ) ); ?></p>
+											<p class="viz-group-description viz-info-msg" style="display:none"><?php echo sprintf( __( 'Please make sure you click \'Show Chart\' before you save the chart.', 'visualizer' ) ); ?></p>
 										</div>
 										<?php } else { ?>
 											<input type="button" id="editor-undo" class="button button-secondary" style="display: none" value="<?php _e( 'Undo Changes', 'visualizer' ); ?>">
 											<input type="button" id="editor-chart-button" class="button button-primary "
-												   value="<?php _e( 'View Editor', 'visualizer' ); ?>" data-current="chart"
-												   data-t-editor="<?php _e( 'Show Chart', 'visualizer' ); ?>"
-												   data-t-chart="<?php _e( 'View Editor', 'visualizer' ); ?>"
+													value="<?php _e( 'View Editor', 'visualizer' ); ?>" data-current="chart"
+													data-t-editor="<?php _e( 'Show Chart', 'visualizer' ); ?>"
+													data-t-chart="<?php _e( 'View Editor', 'visualizer' ); ?>"
 											>
-											<p class="viz-group-description viz-info-msg"><?php echo sprintf( __( 'Please make sure you click \'Show Chart\' before you save the chart.', 'visualizer' ) ); ?></p>
+											<p class="viz-group-description viz-info-msg" style="display:none"><?php echo sprintf( __( 'Please make sure you click \'Show Chart\' before you save the chart.', 'visualizer' ) ); ?></p>
 										<?php } ?>
 									</form>
 								</div>
@@ -1017,8 +1016,8 @@ class="dashicons dashicons-lock"></span></h2>
 											</select>
 										</form>
 										<input type="button" id="existing-chart" class="button button-primary"
-											   value="<?php _e( 'Import Chart', 'visualizer' ); ?>"
-											   data-viz-link="<?php echo $fetch_link; ?>">
+												value="<?php _e( 'Import Chart', 'visualizer' ); ?>"
+												data-viz-link="<?php echo $fetch_link; ?>">
 										<?php
 										if ( ! Visualizer_Module_Admin::proFeaturesLocked() ) {
 											echo apply_filters( 'visualizer_pro_upsell', '', 'import-chart' );
@@ -1072,7 +1071,7 @@ class="dashicons dashicons-lock"></span></h2>
 											<input type="button" id="filter-chart-button" class="button button-secondary show-chart-toggle" value="<?php echo $bttn_label; ?>" data-current="chart" data-t-filter="<?php _e( 'Show Chart', 'visualizer' ); ?>" data-t-chart="<?php echo $bttn_label; ?>">
 											<input type="button" id="db-filter-save-button" class="button button-primary" value="<?php _e( 'Save Schedule', 'visualizer' ); ?>">
 										</form>
-										<?php echo apply_filters( 'visualizer_pro_upsell', '', 'import-wp' ); ?>
+										<?php echo apply_filters( 'visualizer_pro_upsell', '', 'import-wp', 'https://docs.themeisle.com/article/1278-how-to-import-data-from-wordpress' ); ?>
 									</div>
 								</div>
 							</li>
@@ -1218,7 +1217,7 @@ class="dashicons dashicons-lock"></span></h2>
 
 									<input type="button" id="db-chart-button" class="button button-secondary show-chart-toggle" value="<?php echo $bttn_label; ?>" data-current="chart" data-t-filter="<?php _e( 'Show Chart', 'visualizer' ); ?>" data-t-chart="<?php echo $bttn_label; ?>">
 									<input type="button" id="db-chart-save-button" class="button button-primary" value="<?php _e( 'Save Schedule', 'visualizer' ); ?>">
-									<?php echo apply_filters( 'visualizer_pro_upsell', '', 'db-query' ); ?>
+									<?php echo apply_filters( 'visualizer_pro_upsell', '', 'db-query', 'https://docs.themeisle.com/article/1279-how-to-import-data-from-a-database' ); ?>
 								</form>
 							</div>
 							</div>
diff --git a/classes/Visualizer/Render/Library.php b/classes/Visualizer/Render/Library.php
index b4aba1b8d..5a59d7fb1 100644
--- a/classes/Visualizer/Render/Library.php
+++ b/classes/Visualizer/Render/Library.php
@@ -152,7 +152,7 @@ private function getDisplayForm() {
 		}
 		$sources = array_filter( $sources );
 		uasort(
-			$sources, function( $a, $b ) {
+			$sources, function ( $a, $b ) {
 				if ( $a === $b ) {
 					return 0;
 				}
@@ -223,8 +223,8 @@ private function _renderProPopupBlocker() {
 		$license_key = '';
 		$download_id = '';
 		if ( ! empty( $license ) && is_object( $license ) ) {
-			$license_key = $license->key;
-			$download_id = $license->download_id;
+			$license_key = isset( $license->key ) ? $license->key : '';
+			$download_id = isset( $license->download_id ) ? $license->download_id : '';
 		}
 		$admin_license_url = admin_url( 'options-general.php#visualizer_pro_license' );
 		$renew_license_url = tsdk_utmify( Visualizer_Plugin::STORE_URL . '?edd_license_key=' . $license_key . '&download_id=' . $download_id, 'visualizer_license_block' );
@@ -257,7 +257,6 @@ function closePopup() {
 					popup.style.display = "none";
 				}
 				</script>';
-
 	}
 	/**
 	 * Renders library content.
@@ -287,7 +286,7 @@ private function _renderLibrary() {
 			$count = 0;
 			foreach ( $this->charts as $placeholder_id => $chart ) {
 				// show the sidebar after the first 3 charts.
-				$count++;
+				++$count;
 				$enable_controls = false;
 				$settings = isset( $chart['settings'] ) ? $chart['settings'] : array();
 				if ( ! empty( $settings['controls']['controlType'] ) ) {
@@ -400,7 +399,7 @@ private function _renderChartBox( $placeholder_id, $chart_id, $with_filter = fal
 		);
 		$chart_type = get_post_meta( $chart_id, Visualizer_Plugin::CF_CHART_TYPE, true );
 
-		$types = ['area', 'geo', 'column', 'bubble', 'scatter', 'gauge', 'candlestick', 'timeline', 'combo', 'polarArea', 'radar' ];
+		$types = array( 'area', 'geo', 'column', 'bubble', 'scatter', 'gauge', 'candlestick', 'timeline', 'combo', 'polarArea', 'radar' );
 
 		$pro_class = '';
 
@@ -477,5 +476,4 @@ private function _renderSidebar() {
 			echo '</div>';
 		}
 	}
-
 }
diff --git a/classes/Visualizer/Render/Page.php b/classes/Visualizer/Render/Page.php
index aa5eacd6c..5f70c1e0c 100644
--- a/classes/Visualizer/Render/Page.php
+++ b/classes/Visualizer/Render/Page.php
@@ -86,5 +86,4 @@ protected function _renderSidebarContent() {}
 	 * @access protected
 	 */
 	protected function _renderToolbar() {}
-
 }
diff --git a/classes/Visualizer/Render/Page/Data.php b/classes/Visualizer/Render/Page/Data.php
index 9e248ec48..6730db0bd 100644
--- a/classes/Visualizer/Render/Page/Data.php
+++ b/classes/Visualizer/Render/Page/Data.php
@@ -93,7 +93,7 @@ protected function _renderSidebarContent() {
 			</div>
 			<div class="viz-info-item">
 				<label for="viz-backend-name"><?php _e( 'Backend chart title for internal usage', 'visualizer' ); ?></label>
-				<input type="text" id="viz-backend-name" value="<?php echo  $hasTitle ? $chartSettings['backend-title'] : ( '#' . esc_attr( $this->chart->ID ) ); ?>">
+				<input type="text" id="viz-backend-name" value="<?php echo $hasTitle ? $chartSettings['backend-title'] : ( '#' . esc_attr( $this->chart->ID ) ); ?>">
 			</div>
 		</div>
 		<div id="viz-tabs">
@@ -156,5 +156,4 @@ private function add_additional_content() {
 		Visualizer_Render_Layout::show( 'db-query', $query, $this->chart->ID );
 		Visualizer_Render_Layout::show( 'json-screen', $this->chart->ID );
 	}
-
 }
diff --git a/classes/Visualizer/Render/Page/Send.php b/classes/Visualizer/Render/Page/Send.php
index 3f21f2c26..b1cb52483 100644
--- a/classes/Visualizer/Render/Page/Send.php
+++ b/classes/Visualizer/Render/Page/Send.php
@@ -53,5 +53,4 @@ protected function _toHTML() {
 			echo '<body></body>';
 		echo '</html>';
 	}
-
 }
diff --git a/classes/Visualizer/Render/Page/Settings.php b/classes/Visualizer/Render/Page/Settings.php
index e3b1d37b0..a8133eb74 100644
--- a/classes/Visualizer/Render/Page/Settings.php
+++ b/classes/Visualizer/Render/Page/Settings.php
@@ -80,5 +80,4 @@ protected function _toHTML() {
 	protected function _renderSidebarContent() {
 		echo $this->sidebar;
 	}
-
 }
diff --git a/classes/Visualizer/Render/Page/Update.php b/classes/Visualizer/Render/Page/Update.php
index 0eb54d3fa..c9f8f6735 100644
--- a/classes/Visualizer/Render/Page/Update.php
+++ b/classes/Visualizer/Render/Page/Update.php
@@ -91,5 +91,4 @@ private function updateEditorAndSettings() {
 
 		return 'win.vizUpdateHTML(' . json_encode( array( 'html' => $editor ) ) . ', ' . json_encode( array( 'html' => $sidebar ) ) . ');';
 	}
-
 }
diff --git a/classes/Visualizer/Render/Sidebar.php b/classes/Visualizer/Render/Sidebar.php
index 79e400b43..5e13bd01f 100644
--- a/classes/Visualizer/Render/Sidebar.php
+++ b/classes/Visualizer/Render/Sidebar.php
@@ -208,7 +208,6 @@ protected function _renderAdvancedSettings() {
 
 		self::_renderSectionEnd();
 		self::_renderGroupEnd();
-
 	}
 
 	/**
@@ -276,7 +275,7 @@ protected function _renderActionSettings() {
 	private static function is_excel_enabled() {
 		$vendor_file = VISUALIZER_ABSPATH . '/vendor/autoload.php';
 		if ( is_readable( $vendor_file ) ) {
-			include_once( $vendor_file );
+			include_once $vendor_file;
 		}
 
 		if ( version_compare( phpversion(), '5.6.0', '<' ) ) {
@@ -313,7 +312,7 @@ public static function _renderSelectItem( $title, $name, $value, array $options,
 		echo '<div class="viz-section-item">';
 			echo '<a class="more-info" href="javascript:;">[?]</a>';
 			echo '<b>', $title, '</b>';
-			echo '<select class="control-select ', implode( ' ', $classes ) , '" name="', $name, '" ', ( $multiple ? 'multiple' : '' ), ' ' , $atts, '>';
+			echo '<select class="control-select ', implode( ' ', $classes ), '" name="', $name, '" ', ( $multiple ? 'multiple' : '' ), ' ', $atts, '>';
 		foreach ( $options as $key => $label ) {
 			// phpcs:ignore WordPress.PHP.StrictInArray.MissingTrueStrict
 			$extra      = $multiple && is_array( $value ) ? ( in_array( $key, $value ) ? 'selected' : '' ) : selected( $key, $value, false );
@@ -336,13 +335,13 @@ public static function _renderSelectItem( $title, $name, $value, array $options,
 	 * @param string $title The title of the select item.
 	 * @param string $name The name of the select item.
 	 * @param string $value The actual value of the select item.
-	 * @param string $default The default value of the color picker.
+	 * @param string $default_color The default value of the color picker.
 	 */
-	protected static function _renderColorPickerItem( $title, $name, $value, $default ) {
+	protected static function _renderColorPickerItem( $title, $name, $value, $default_color ) {
 		echo '<div class="viz-section-item">';
 			echo '<b>', $title, '</b>';
 			echo '<div>';
-				echo '<input type="text" class="color-picker-hex color-picker" data-alpha-enabled="true" name="', $name, '" maxlength="7" placeholder="', esc_attr__( 'Hex Value', 'visualizer' ), '" value="', is_null( $value ) ? $default : esc_attr( $value ), '" data-default-color="', $default, '">';
+				echo '<input type="text" class="color-picker-hex color-picker" data-alpha-enabled="true" name="', $name, '" maxlength="7" placeholder="', esc_attr__( 'Hex Value', 'visualizer' ), '" value="', is_null( $value ) ? $default_color : esc_attr( $value ), '" data-default-color="', $default_color, '">';
 			echo '</div>';
 		echo '</div>';
 	}
@@ -387,10 +386,10 @@ protected static function _renderTextItem( $title, $name, $value, $desc, $placeh
 	 * @access public
 	 * @param string $title The title of this group.
 	 * @param string $html Any additional HTML.
-	 * @param string $class Any additional classes.
+	 * @param string $extra_class Any additional classes.
 	 */
-	public static function _renderGroupStart( $title, $html = '', $class = '', $id = '' ) {
-		echo '<li id="' . $id . '" class="viz-group ' . $class . '">';
+	public static function _renderGroupStart( $title, $html = '', $extra_class = '', $id = '' ) {
+		echo '<li id="' . $id . '" class="viz-group ' . $extra_class . '">';
 			echo '<h3 class="viz-group-title">', $title, '</h3>';
 			echo $html;
 			echo '<ul class="viz-group-content">';
@@ -506,12 +505,11 @@ protected function _renderFormatField( $index = 0 ) {
 	/**
 	 * Render a checkbox item
 	 */
-	protected static function _renderCheckboxItem( $title, $name, $value, $default, $desc, $disabled = false ) {
+	protected static function _renderCheckboxItem( $title, $name, $value, $default_value, $desc, $disabled = false ) {
 		echo '<div class="viz-section-item">';
 			echo '<a class="more-info" href="javascript:;">[?]</a>';
 			echo '<b>', $title, '</b>';
-			// phpcs:ignore WordPress.PHP.StrictComparisons.LooseComparison
-			echo '<input type="checkbox" class="control-check" value="', $default, '" name="', $name, '" ', ( $value == $default ? 'checked' : '' ), ' ', ( $disabled ? 'disabled=disabled' : '' ), '>';
+			echo '<input type="checkbox" class="control-check" value="', $default_value, '" name="', $name, '" ', ( $value ? 'checked' : '' ), ' ', ( $disabled ? 'disabled=disabled' : '' ), '>';
 			echo '<p class="viz-section-description">', $desc, '</p>';
 		echo '</div>';
 	}
@@ -552,7 +550,6 @@ protected function load_dependent_assets( $libs ) {
 		if ( in_array( 'numeral', $libs, true ) && ! wp_script_is( 'numeral', 'registered' ) ) {
 			wp_register_script( 'numeral', VISUALIZER_ABSURL . 'js/lib/numeral.min.js', array(), Visualizer_Plugin::VERSION );
 		}
-
 	}
 
 	/**
@@ -656,8 +653,8 @@ protected function _renderChartControlsSettings() {
 			array( 'vz-controls-opt' )
 		);
 
-		$column_index = [ 'false' => '' ];
-		$column_label = [ 'false' => '' ];
+		$column_index = array( 'false' => '' );
+		$column_label = array( 'false' => '' );
 		if ( ! empty( $this->__series ) ) {
 			foreach ( $this->__series as $key => $column ) {
 				$column_type            = isset( $column['type'] ) ? $column['type'] : '';
diff --git a/classes/Visualizer/Render/Sidebar/ChartJS.php b/classes/Visualizer/Render/Sidebar/ChartJS.php
index d4da43b31..1323e6c2e 100644
--- a/classes/Visualizer/Render/Sidebar/ChartJS.php
+++ b/classes/Visualizer/Render/Sidebar/ChartJS.php
@@ -38,7 +38,6 @@ public function __construct( $data = array() ) {
 			'bottom' => esc_html__( 'Below the chart', 'visualizer' ),
 			'none'   => esc_html__( 'Omit the legend', 'visualizer' ),
 		);
-
 	}
 
 	/**
@@ -78,7 +77,7 @@ protected function hooks() {
 	/**
 	 * Loads the assets.
 	 */
-	function load_chartjs_assets( $deps, $is_frontend ) {
+	public function load_chartjs_assets( $deps, $is_frontend ) {
 		$this->load_dependent_assets( array( 'moment', 'numeral' ) );
 
 		wp_register_script( 'chartjs', VISUALIZER_ABSURL . 'js/lib/chartjs.min.js', array( 'numeral', 'moment' ), null, true );
@@ -96,7 +95,6 @@ function load_chartjs_assets( $deps, $is_frontend ) {
 			$deps,
 			array( 'visualizer-render-chartjs-lib' )
 		);
-
 	}
 
 	/**
@@ -133,7 +131,6 @@ protected function _renderSeriesSettings() {
 	protected function _renderSeries( $index ) {
 		$this->_renderFormatField( $index );
 		$this->_renderChartTypeSeries( $index );
-
 	}
 
 	/**
@@ -187,7 +184,6 @@ protected function _renderChartTitleSettings() {
 				'</a>'
 			)
 		);
-
 	}
 
 	/**
@@ -367,7 +363,6 @@ protected function _renderAnimationSettings() {
 		);
 
 		self::_renderSectionEnd();
-
 	}
 
 	/**
diff --git a/classes/Visualizer/Render/Sidebar/Columnar.php b/classes/Visualizer/Render/Sidebar/Columnar.php
index 460043b9e..1a1af1709 100644
--- a/classes/Visualizer/Render/Sidebar/Columnar.php
+++ b/classes/Visualizer/Render/Sidebar/Columnar.php
@@ -110,5 +110,4 @@ protected function _renderHorizontalAxisGeneralSettings() {
 			'#000'
 		);
 	}
-
 }
diff --git a/classes/Visualizer/Render/Sidebar/Google.php b/classes/Visualizer/Render/Sidebar/Google.php
index 3f7cd8198..5810cc1ed 100644
--- a/classes/Visualizer/Render/Sidebar/Google.php
+++ b/classes/Visualizer/Render/Sidebar/Google.php
@@ -82,7 +82,6 @@ public function __construct( $data = array() ) {
 			'center' => esc_html__( 'Centered in the allocated area', 'visualizer' ),
 			'end'    => esc_html__( 'Aligned to the end of the allocated area', 'visualizer' ),
 		);
-
 	}
 
 	/**
@@ -99,7 +98,7 @@ protected function hooks() {
 	/**
 	 * Loads the assets.
 	 */
-	function load_google_assets( $deps, $is_frontend ) {
+	public function load_google_assets( $deps, $is_frontend ) {
 		wp_register_script( 'google-jsapi', '//www.gstatic.com/charts/loader.js', array(), null, true );
 		wp_register_script( 'dom-to-image', VISUALIZER_ABSURL . 'js/lib/dom-to-image.min.js', array(), null, true );
 		wp_register_script(
@@ -117,7 +116,6 @@ function load_google_assets( $deps, $is_frontend ) {
 			$deps,
 			array( 'visualizer-render-google-lib' )
 		);
-
 	}
 
 	/**
@@ -309,7 +307,6 @@ protected function _renderAnimationSettings() {
 		);
 
 		self::_renderSectionEnd();
-
 	}
 
 	/**
diff --git a/classes/Visualizer/Render/Sidebar/Graph.php b/classes/Visualizer/Render/Sidebar/Graph.php
index 7ee73de7b..80a2a51a9 100644
--- a/classes/Visualizer/Render/Sidebar/Graph.php
+++ b/classes/Visualizer/Render/Sidebar/Graph.php
@@ -136,7 +136,6 @@ protected function _renderChartTitleSettings() {
 				'</a>'
 			)
 		);
-
 	}
 
 	/**
@@ -461,7 +460,6 @@ protected function _renderSeries( $index ) {
 		);
 
 		$this->_renderRoleField( $index );
-
 	}
 
 	/**
@@ -525,5 +523,4 @@ protected function _renderVerticalAxisFormatField() {
 			)
 		);
 	}
-
 }
diff --git a/classes/Visualizer/Render/Sidebar/Linear.php b/classes/Visualizer/Render/Sidebar/Linear.php
index 5769f4bc4..7a7b250f8 100644
--- a/classes/Visualizer/Render/Sidebar/Linear.php
+++ b/classes/Visualizer/Render/Sidebar/Linear.php
@@ -291,7 +291,5 @@ protected function _renderSeries( $index ) {
 		);
 
 		$this->_renderRoleField( $index );
-
 	}
-
 }
diff --git a/classes/Visualizer/Render/Sidebar/Type/ChartJS/Bar.php b/classes/Visualizer/Render/Sidebar/Type/ChartJS/Bar.php
index 807ae4376..7f0bdb385 100644
--- a/classes/Visualizer/Render/Sidebar/Type/ChartJS/Bar.php
+++ b/classes/Visualizer/Render/Sidebar/Type/ChartJS/Bar.php
@@ -131,6 +131,5 @@ protected function _renderChartTypeSettings() {
 			self::_renderSectionEnd();
 
 		self::_renderGroupEnd();
-
 	}
 }
diff --git a/classes/Visualizer/Render/Sidebar/Type/ChartJS/Linear.php b/classes/Visualizer/Render/Sidebar/Type/ChartJS/Linear.php
index a1646331b..f42cac084 100644
--- a/classes/Visualizer/Render/Sidebar/Type/ChartJS/Linear.php
+++ b/classes/Visualizer/Render/Sidebar/Type/ChartJS/Linear.php
@@ -79,7 +79,6 @@ protected function _renderHorizontalTickSettings() {
 			);
 
 		self::_renderSectionEnd();
-
 	}
 
 	/**
@@ -124,7 +123,6 @@ protected function _renderVerticalTickSettings() {
 			);
 
 		self::_renderSectionEnd();
-
 	}
 
 	/**
@@ -318,6 +316,5 @@ protected function _renderVerticalAxisGeneralSettings() {
 			);
 
 		self::_renderSectionEnd();
-
 	}
 }
diff --git a/classes/Visualizer/Render/Sidebar/Type/ChartJS/Pie.php b/classes/Visualizer/Render/Sidebar/Type/ChartJS/Pie.php
index 987dbf202..96fb590b7 100644
--- a/classes/Visualizer/Render/Sidebar/Type/ChartJS/Pie.php
+++ b/classes/Visualizer/Render/Sidebar/Type/ChartJS/Pie.php
@@ -86,7 +86,6 @@ protected function _renderSliceSettings( $index ) {
 			isset( $this->slices[ $index ]['hoverBackgroundColor'] ) ? $this->slices[ $index ]['hoverBackgroundColor'] : null,
 			null
 		);
-
 	}
 
 	/**
diff --git a/classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php b/classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
deleted file mode 100644
index fd48a5130..000000000
--- a/classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
+++ /dev/null
@@ -1,527 +0,0 @@
-<?php
-
-// +----------------------------------------------------------------------+
-// | Copyright 2013  Madpixels  (email : visualizer@madpixels.net)        |
-// +----------------------------------------------------------------------+
-// | This program is free software; you can redistribute it and/or modify |
-// | it under the terms of the GNU General Public License, version 2, as  |
-// | published by the Free Software Foundation.                           |
-// |                                                                      |
-// | This program is distributed in the hope that it will be useful,      |
-// | but WITHOUT ANY WARRANTY; without even the implied warranty of       |
-// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        |
-// | GNU General Public License for more details.                         |
-// |                                                                      |
-// | You should have received a copy of the GNU General Public License    |
-// | along with this program; if not, write to the Free Software          |
-// | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,               |
-// | MA 02110-1301 USA                                                    |
-// +----------------------------------------------------------------------+
-// | Author: Eugene Manuilov <eugene@manuilov.org>                        |
-// +----------------------------------------------------------------------+
-/**
- * Class for datatables.net table chart sidebar settings.
- *
- * THIS IS ONLY FOR BACKWARD COMPATIBILITY ON DEV SYSTEMS. CAN BE REMOVED IN A FUTURE RELEASE.
- *
- * @since 1.0.0
- */
-class Visualizer_Render_Sidebar_Type_DataTable_DataTable extends Visualizer_Render_Sidebar {
-
-
-	/**
-	 * Constructor.
-	 *
-	 * @since 1.0.0
-	 *
-	 * @access public
-	 * @param array $data The data what has to be associated with this render.
-	 */
-	public function __construct( $data = array() ) {
-		$this->_library = 'datatables';
-		$this->_includeCurveTypes = false;
-
-		parent::__construct( $data );
-	}
-
-	/**
-	 * Registers additional hooks.
-	 *
-	 * @access protected
-	 */
-	protected function hooks() {
-		if ( $this->_library === 'datatables' ) {
-			add_filter( 'visualizer_assets_render', array( $this, 'load_assets' ), 10, 2 );
-		}
-	}
-
-	/**
-	 * Registers assets.
-	 *
-	 * @access public
-	 */
-	function load_assets( $deps, $is_frontend ) {
-		$this->load_dependent_assets( array( 'moment' ) );
-
-		wp_register_script( 'visualizer-datatables', VISUALIZER_ABSURL . 'js/lib/datatables.min.js', array( 'jquery-ui-core', 'moment' ), Visualizer_Plugin::VERSION );
-		wp_enqueue_style( 'visualizer-datatables', VISUALIZER_ABSURL . 'css/lib/datatables.min.css', array(), Visualizer_Plugin::VERSION );
-
-		wp_register_script(
-			'visualizer-render-datatables-lib',
-			VISUALIZER_ABSURL . 'js/render-datatables.js',
-			array(
-				'visualizer-datatables',
-			),
-			Visualizer_Plugin::VERSION,
-			true
-		);
-
-		return array_merge(
-			$deps,
-			array( 'visualizer-render-datatables-lib' )
-		);
-	}
-
-	/**
-	 * Enqueue assets.
-	 */
-	public static function enqueue_assets( $deps = array() ) {
-		wp_enqueue_style( 'visualizer-datatables', VISUALIZER_ABSURL . 'css/lib/datatables.min.css', array(), Visualizer_Plugin::VERSION );
-		wp_enqueue_script( 'visualizer-datatables', VISUALIZER_ABSURL . 'js/lib/datatables.min.js', array( 'jquery-ui-core' ), Visualizer_Plugin::VERSION );
-		wp_enqueue_script( 'visualizer-render-datatables-lib', VISUALIZER_ABSURL . 'js/render-datatables.js', array_merge( $deps, array( 'jquery-ui-core', 'visualizer-datatables' ) ), Visualizer_Plugin::VERSION, true );
-		return 'visualizer-render-datatables-lib';
-	}
-
-	/**
-	 * Renders template.
-	 *
-	 * @since 1.0.0
-	 *
-	 * @access protected
-	 */
-	protected function _toHTML() {
-		$this->_supportsAnimation = false;
-		$this->_renderGeneralSettings();
-		$this->_renderTableSettings();
-		 $this->_renderColumnSettings();
-		$this->_renderAdvancedSettings();
-	}
-
-	/**
-	 * Renders chart advanced settings group.
-	 *
-	 * @access protected
-	 */
-	protected function _renderAdvancedSettings() {
-		self::_renderGroupStart( esc_html__( 'Frontend Actions', 'visualizer' ) );
-			self::_renderSectionStart();
-				self::_renderSectionDescription( esc_html__( 'Configure frontend actions that need to be shown.', 'visualizer' ) );
-			self::_renderSectionEnd();
-
-			$this->_renderActionSettings();
-		self::_renderGroupEnd();
-	}
-
-	/**
-	 * Renders general settings group.
-	 *
-	 * @since 1.0.0
-	 *
-	 * @access protected
-	 */
-	protected function _renderGeneralSettings() {
-		self::_renderGroupStart( esc_html__( 'General Settings', 'visualizer' ) );
-			self::_renderSectionStart( esc_html__( 'Title', 'visualizer' ), true );
-				self::_renderTextItem(
-					esc_html__( 'Chart Title', 'visualizer' ),
-					'title',
-					$this->title,
-					esc_html__( 'Text to display in the back-end admin area.', 'visualizer' )
-				);
-
-				echo '<div class="viz-section-delimiter"></div>';
-
-				self::_renderTextAreaItem(
-					esc_html__( 'Chart Description', 'visualizer' ),
-					'description',
-					$this->description,
-					sprintf(
-						// translators: %1$s - HTML link tag, %2$s - HTML closing link tag.
-						esc_html__( 'Description to display in the structured data schema as explained %1$shere%2$s', 'visualizer' ),
-						'<a href="https://developers.google.com/search/docs/data-types/dataset#dataset" target="_blank">',
-						'</a>'
-					)
-				);
-
-			self::_renderSectionEnd();
-
-			self::_renderChartImageSettings();
-
-		self::_renderGroupEnd();
-	}
-
-	/**
-	 * Renders line settings items.
-	 *
-	 * @since 1.0.0
-	 *
-	 * @access protected
-	 */
-	protected function _renderTableSettings() {
-		self::_renderGroupStart( esc_html__( 'Table Settings', 'visualizer' ) );
-			self::_renderSectionStart();
-
-				self::_renderCheckboxItem(
-					esc_html__( 'Enable Pagination', 'visualizer' ),
-					'paging_bool',
-					$this->paging_bool,
-					'true',
-					esc_html__( 'To enable paging through the data.', 'visualizer' )
-				);
-
-				echo '<div class="viz-section-delimiter section-delimiter"></div>';
-
-				self::_renderTextItem(
-					esc_html__( 'Number of rows per page', 'visualizer' ),
-					'pageLength_int',
-					$this->pageLength_int,
-					esc_html__( 'The number of rows in each page, when paging is enabled.', 'visualizer' ),
-					10,
-					'number',
-					array( 'min' => 1 )
-				);
-
-				echo '<div class="viz-section-delimiter section-delimiter"></div>';
-
-				self::_renderSelectItem(
-					esc_html__( 'Pagination type', 'visualizer' ),
-					'pagingType',
-					$this->pagingType,
-					array(
-						'numbers'  => esc_html__( 'Page number buttons only', 'visualizer' ),
-						'simple'  => esc_html__( '\'Previous\' and \'Next\' buttons only', 'visualizer' ),
-						'simple_numbers'  => esc_html__( '\'Previous\' and \'Next\' buttons, plus page numbers', 'visualizer' ),
-						'full'  => esc_html__( '\'First\', \'Previous\', \'Next\' and \'Last\' buttons', 'visualizer' ),
-						'full_numbers'  => esc_html__( '\'First\', \'Previous\', \'Next\' and \'Last\' buttons, plus page numbers', 'visualizer' ),
-						'first_last_numbers'  => esc_html__( '\'First\' and \'Last\' buttons, plus page numbers', 'visualizer' ),
-					),
-					esc_html__( 'Determines what type of pagination options to show.', 'visualizer' )
-				);
-
-				do_action( 'visualizer_chart_settings', __CLASS__, $this->_data, 'pagination' );
-
-				echo '<div class="viz-section-delimiter section-delimiter"></div>';
-
-				self::_renderTextItem(
-					esc_html__( 'Table Height', 'visualizer' ),
-					'scrollY_int',
-					isset( $this->scrollY_int ) ? $this->scrollY_int : '',
-					esc_html__( 'Height of the table in pixels (the table will show a scrollbar).', 'visualizer' ),
-					'',
-					'number',
-					array(
-						'min' => 0,
-					)
-				);
-
-				self::_renderCheckboxItem(
-					esc_html__( 'Enable Horizontal Scrolling', 'visualizer' ),
-					'scrollX',
-					$this->scrollX,
-					'true',
-					esc_html__( 'To disable wrapping of columns and enabling horizontal scrolling.', 'visualizer' )
-				);
-
-				echo '<div class="viz-section-delimiter section-delimiter"></div>';
-
-				self::_renderCheckboxItem(
-					esc_html__( 'Disable Sort', 'visualizer' ),
-					'ordering_bool',
-					$this->ordering_bool,
-					'false',
-					esc_html__( 'To disable sorting on columns.', 'visualizer' )
-				);
-
-				echo '<div class="viz-section-delimiter section-delimiter"></div>';
-
-				self::_renderCheckboxItem(
-					esc_html__( 'Freeze Header/Footer', 'visualizer' ),
-					'fixedHeader_bool',
-					$this->fixedHeader_bool,
-					'true',
-					esc_html__( 'Freeze the header and footer.', 'visualizer' )
-				);
-
-				echo '<div class="viz-section-delimiter section-delimiter"></div>';
-
-				self::_renderCheckboxItem(
-					esc_html__( 'Responsive table?', 'visualizer' ),
-					'responsive_bool',
-					$this->responsive_bool,
-					'true',
-					esc_html__( 'Enable the table to be responsive.', 'visualizer' )
-				);
-
-				do_action( 'visualizer_chart_settings', __CLASS__, $this->_data, 'table' );
-
-			self::_renderSectionEnd();
-		self::_renderGroupEnd();
-
-		self::_renderGroupStart( esc_html__( 'Row/Cell Settings', 'visualizer' ) );
-
-			self::_renderSectionStart( esc_html__( 'Header Row', 'visualizer' ) );
-
-				self::_renderSectionDescription( esc_html__( 'These values may not reflect on preview and will be applied once you save and reload the chart. ', 'visualizer' ), 'viz-info-msg' );
-
-				self::_renderColorPickerItem(
-					esc_html__( 'Background Color', 'visualizer' ),
-					'customcss[headerRow][background-color]',
-					isset( $this->customcss['headerRow']['background-color'] ) ? $this->customcss['headerRow']['background-color'] : null,
-					null
-				);
-
-				self::_renderColorPickerItem(
-					esc_html__( 'Color', 'visualizer' ),
-					'customcss[headerRow][color]',
-					isset( $this->customcss['headerRow']['color'] ) ? $this->customcss['headerRow']['color'] : null,
-					null
-				);
-
-				self::_renderTextItem(
-					esc_html__( 'Text Orientation', 'visualizer' ),
-					'customcss[headerRow][transform]',
-					isset( $this->customcss['headerRow']['transform'] ) ? $this->customcss['headerRow']['transform'] : null,
-					esc_html__( 'In degrees.', 'visualizer' ),
-					'',
-					'number',
-					array(
-						'min' => -180,
-						'max' => 180,
-					)
-				);
-			self::_renderSectionEnd();
-
-			self::_renderSectionStart( esc_html__( 'Odd Table Row', 'visualizer' ) );
-
-				self::_renderSectionDescription( esc_html__( 'These values may not reflect on preview and will be applied once you save and reload the chart. ', 'visualizer' ), 'viz-info-msg' );
-
-				self::_renderColorPickerItem(
-					esc_html__( 'Background Color', 'visualizer' ),
-					'customcss[oddTableRow][background-color]',
-					isset( $this->customcss['oddTableRow']['background-color'] ) ? $this->customcss['oddTableRow']['background-color'] : null,
-					null
-				);
-
-				self::_renderColorPickerItem(
-					esc_html__( 'Color', 'visualizer' ),
-					'customcss[oddTableRow][color]',
-					isset( $this->customcss['oddTableRow']['color'] ) ? $this->customcss['oddTableRow']['color'] : null,
-					null
-				);
-
-				self::_renderTextItem(
-					esc_html__( 'Text Orientation', 'visualizer' ),
-					'customcss[oddTableRow][transform]',
-					isset( $this->customcss['oddTableRow']['transform'] ) ? $this->customcss['oddTableRow']['transform'] : null,
-					esc_html__( 'In degrees.', 'visualizer' ),
-					'',
-					'number',
-					array(
-						'min' => -180,
-						'max' => 180,
-					)
-				);
-			self::_renderSectionEnd();
-
-			self::_renderSectionStart( esc_html__( 'Even Table Row', 'visualizer' ) );
-
-				self::_renderSectionDescription( esc_html__( 'These values may not reflect on preview and will be applied once you save and reload the chart. ', 'visualizer' ), 'viz-info-msg' );
-
-				self::_renderColorPickerItem(
-					esc_html__( 'Background Color', 'visualizer' ),
-					'customcss[evenTableRow][background-color]',
-					isset( $this->customcss['evenTableRow']['background-color'] ) ? $this->customcss['evenTableRow']['background-color'] : null,
-					null
-				);
-
-				self::_renderColorPickerItem(
-					esc_html__( 'Color', 'visualizer' ),
-					'customcss[evenTableRow][color]',
-					isset( $this->customcss['evenTableRow']['color'] ) ? $this->customcss['evenTableRow']['color'] : null,
-					null
-				);
-
-				self::_renderTextItem(
-					esc_html__( 'Text Orientation', 'visualizer' ),
-					'customcss[evenTableRow][transform]',
-					isset( $this->customcss['evenTableRow']['transform'] ) ? $this->customcss['evenTableRow']['transform'] : null,
-					esc_html__( 'In degrees.', 'visualizer' ),
-					'',
-					'number',
-					array(
-						'min' => -180,
-						'max' => 180,
-					)
-				);
-			self::_renderSectionEnd();
-
-			self::_renderSectionStart( esc_html__( 'Table Cell', 'visualizer' ) );
-
-				self::_renderSectionDescription( esc_html__( 'These values may not reflect on preview and will be applied once you save and reload the chart. ', 'visualizer' ), 'viz-info-msg' );
-
-				self::_renderColorPickerItem(
-					esc_html__( 'Background Color', 'visualizer' ),
-					'customcss[tableCell][background-color]',
-					isset( $this->customcss['tableCell']['background-color'] ) ? $this->customcss['tableCell']['background-color'] : null,
-					null
-				);
-
-				self::_renderColorPickerItem(
-					esc_html__( 'Color', 'visualizer' ),
-					'customcss[tableCell][color]',
-					isset( $this->customcss['tableCell']['color'] ) ? $this->customcss['tableCell']['color'] : null,
-					null
-				);
-
-				self::_renderTextItem(
-					esc_html__( 'Text Orientation', 'visualizer' ),
-					'customcss[tableCell][transform]',
-					isset( $this->customcss['tableCell']['transform'] ) ? $this->customcss['tableCell']['transform'] : null,
-					esc_html__( 'In degrees.', 'visualizer' ),
-					'',
-					'number',
-					array(
-						'min' => -180,
-						'max' => 180,
-					)
-				);
-			self::_renderSectionEnd();
-
-			do_action( 'visualizer_chart_settings', __CLASS__, $this->_data, 'style' );
-
-		self::_renderGroupEnd();
-	}
-
-
-	/**
-	 * Renders combo series settings
-	 *
-	 * @since 1.0.0
-	 *
-	 * @access protected
-	 */
-	protected function _renderColumnSettings() {
-		self::_renderGroupStart( esc_html__( 'Column Settings', 'visualizer' ) );
-		for ( $i = 0, $cnt = count( $this->__series ); $i < $cnt; $i++ ) {
-			if ( ! empty( $this->__series[ $i ]['label'] ) ) {
-				self::_renderSectionStart( esc_html( $this->__series[ $i ]['label'] ), false );
-					$this->_renderFormatField( $i );
-				self::_renderSectionEnd();
-			}
-		}
-		self::_renderGroupEnd();
-	}
-
-	/**
-	 * Renders format field according to series type.
-	 *
-	 * @since 1.3.0
-	 *
-	 * @access protected
-	 * @param int $index The index of the series.
-	 */
-	protected function _renderFormatField( $index = 0 ) {
-		switch ( $this->__series[ $index ]['type'] ) {
-			case 'number':
-				self::_renderTextItem(
-					esc_html__( 'Thousands Separator', 'visualizer' ),
-					'series[' . $index . '][format][thousands]',
-					isset( $this->series[ $index ]['format']['thousands'] ) ? $this->series[ $index ]['format']['thousands'] : ',',
-					null,
-					','
-				);
-				self::_renderTextItem(
-					esc_html__( 'Decimal Separator', 'visualizer' ),
-					'series[' . $index . '][format][decimal]',
-					isset( $this->series[ $index ]['format']['decimal'] ) ? $this->series[ $index ]['format']['decimal'] : '.',
-					null,
-					'.'
-				);
-				self::_renderTextItem(
-					esc_html__( 'Precision', 'visualizer' ),
-					'series[' . $index . '][format][precision]',
-					isset( $this->series[ $index ]['format']['precision'] ) ? $this->series[ $index ]['format']['precision'] : '',
-					esc_html__( 'Round values to how many decimal places?', 'visualizer' ),
-					'',
-					'number',
-					array( 'min' => 0 )
-				);
-				self::_renderTextItem(
-					esc_html__( 'Prefix', 'visualizer' ),
-					'series[' . $index . '][format][prefix]',
-					isset( $this->series[ $index ]['format']['prefix'] ) ? $this->series[ $index ]['format']['prefix'] : '',
-					null,
-					''
-				);
-				self::_renderTextItem(
-					esc_html__( 'Suffix', 'visualizer' ),
-					'series[' . $index . '][format][suffix]',
-					isset( $this->series[ $index ]['format']['suffix'] ) ? $this->series[ $index ]['format']['suffix'] : '',
-					null,
-					''
-				);
-				break;
-			case 'date':
-			case 'datetime':
-			case 'timeofday':
-				self::_renderTextItem(
-					esc_html__( 'Display Date Format', 'visualizer' ),
-					'series[' . $index . '][format][to]',
-					isset( $this->series[ $index ]['format']['to'] ) ? $this->series[ $index ]['format']['to'] : '',
-					sprintf(
-						// translators: %1$s - HTML link tag, %2$s - HTML closing link tag.
-						esc_html__( 'Enter custom format pattern to apply to this series value, similar to the %1$sdate and time formats here%2$s.', 'visualizer' ),
-						'<a href="https://momentjs.com/docs/#/displaying/" target="_blank">',
-						'</a>'
-					),
-					'Do MMM YYYY'
-				);
-				self::_renderTextItem(
-					esc_html__( 'Source Date Format', 'visualizer' ),
-					'series[' . $index . '][format][from]',
-					isset( $this->series[ $index ]['format']['from'] ) ? $this->series[ $index ]['format']['from'] : '',
-					sprintf(
-						// translators: %1$s - HTML link tag, %2$s - HTML closing link tag.
-						esc_html__( 'What format is the source date in? Similar to the %1$sdate and time formats here%2$s.', 'visualizer' ), '<a href="https://momentjs.com/docs/#/displaying/" target="_blank">', '</a>'
-					),
-					'YYYY-MM-DD'
-				);
-				break;
-			case 'boolean':
-				self::_renderTextItem(
-					esc_html__( 'Truthy value', 'visualizer' ),
-					'series[' . $index . '][format][truthy]',
-					isset( $this->series[ $index ]['format']['truthy'] ) ? $this->series[ $index ]['format']['truthy'] : '',
-					sprintf(
-						// translators: %1$s - HTML entity code, %2$s - HTML entity code.
-						esc_html__( 'Provide the HTML entity code for the value the table should display when the value of the column is true. e.g. %1$s (Code: %2$s) instead of true', 'visualizer' ), '&#10004;', '&amp;#10004;'
-					),
-					''
-				);
-				self::_renderTextItem(
-					esc_html__( 'Falsy value', 'visualizer' ),
-					'series[' . $index . '][format][falsy]',
-					isset( $this->series[ $index ]['format']['falsy'] ) ? $this->series[ $index ]['format']['falsy'] : '',
-					sprintf(
-						// translators: %1$s - HTML entity code, %2$s - HTML entity code.
-						esc_html__( 'Provide the HTML entity code for the value the table should display when the value of the column is false. e.g. %1$s (Code: %2$s) instead of false', 'visualizer' ),
-						'&#10006;',
-						'&amp;#10006;'
-					),
-					''
-				);
-				break;
-		}
-	}
-
-}
diff --git a/classes/Visualizer/Render/Sidebar/Type/DataTable/Tabular.php b/classes/Visualizer/Render/Sidebar/Type/DataTable/Tabular.php
index 7839f34dc..32c68c879 100644
--- a/classes/Visualizer/Render/Sidebar/Type/DataTable/Tabular.php
+++ b/classes/Visualizer/Render/Sidebar/Type/DataTable/Tabular.php
@@ -58,7 +58,7 @@ protected function hooks() {
 	 *
 	 * @access public
 	 */
-	function load_assets( $deps, $is_frontend ) {
+	public function load_assets( $deps, $is_frontend ) {
 		$this->load_dependent_assets( array( 'moment' ) );
 
 		wp_register_script( 'visualizer-datatables', VISUALIZER_ABSURL . 'js/lib/datatables.min.js', array( 'jquery-ui-core', 'moment' ), Visualizer_Plugin::VERSION );
@@ -101,7 +101,7 @@ protected function _toHTML() {
 		$this->_supportsAnimation = false;
 		$this->_renderGeneralSettings();
 		$this->_renderTableSettings();
-		 $this->_renderColumnSettings();
+		$this->_renderColumnSettings();
 		$this->_renderAdvancedSettings();
 	}
 
@@ -177,6 +177,9 @@ protected function _renderTableSettings() {
 					esc_html__( 'To enable paging through the data.', 'visualizer' )
 				);
 
+				$paging_enabled = ( isset( $this->paging_bool ) && 'true' === $this->paging_bool );
+			echo '<div class="viz-pagination-options"', ( $paging_enabled ? '' : ' style="display:none"' ), '>';
+
 				echo '<div class="viz-section-delimiter section-delimiter"></div>';
 
 				self::_renderTextItem(
@@ -208,7 +211,9 @@ protected function _renderTableSettings() {
 
 				do_action( 'visualizer_chart_settings', __CLASS__, $this->_data, 'pagination' );
 
-				echo '<div class="viz-section-delimiter section-delimiter"></div>';
+			echo '</div>';
+
+			echo '<div class="viz-section-delimiter section-delimiter"></div>';
 
 				self::_renderTextItem(
 					esc_html__( 'Table Height', 'visualizer' ),
@@ -499,5 +504,4 @@ protected function _renderFormatField( $index = 0 ) {
 				break;
 		}
 	}
-
 }
diff --git a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Area.php b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Area.php
index d4a522362..3d5c0bce4 100644
--- a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Area.php
+++ b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Area.php
@@ -148,5 +148,4 @@ protected function _renderSeries( $index ) {
 			null
 		);
 	}
-
 }
diff --git a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Bar.php b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Bar.php
index fb1f38a55..098f8a8e3 100644
--- a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Bar.php
+++ b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Bar.php
@@ -72,5 +72,4 @@ protected function _toHTML() {
 		$this->_renderViewSettings();
 		$this->_renderAdvancedSettings();
 	}
-
 }
diff --git a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Bubble.php b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Bubble.php
index 203ad8874..28d2761a0 100644
--- a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Bubble.php
+++ b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Bubble.php
@@ -115,8 +115,5 @@ protected function _renderBubbleSettings() {
 
 			self::_renderSectionEnd();
 		self::_renderGroupEnd();
-
 	}
-
-
 }
diff --git a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Candlestick.php b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Candlestick.php
index 04eec1042..453d469b3 100644
--- a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Candlestick.php
+++ b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Candlestick.php
@@ -175,5 +175,4 @@ protected function _renderSeries( $index ) {
 			null
 		);
 	}
-
 }
diff --git a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Column.php b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Column.php
index a9f8024e1..24ee5e3cb 100644
--- a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Column.php
+++ b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Column.php
@@ -72,5 +72,4 @@ protected function _toHTML() {
 		$this->_renderViewSettings();
 		$this->_renderAdvancedSettings();
 	}
-
 }
diff --git a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Gauge.php b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Gauge.php
index a3529e8a4..56a2c4db1 100644
--- a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Gauge.php
+++ b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Gauge.php
@@ -309,5 +309,4 @@ protected function _renderViewSettings() {
 			self::_renderSectionEnd();
 		self::_renderGroupEnd();
 	}
-
 }
diff --git a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Geo.php b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Geo.php
index 4b72929bc..2c07589c1 100644
--- a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Geo.php
+++ b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Geo.php
@@ -465,5 +465,4 @@ protected function _renderViewSettings() {
 			self::_renderSectionEnd();
 		self::_renderGroupEnd();
 	}
-
 }
diff --git a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Line.php b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Line.php
index 8f2f786d5..e8c954353 100644
--- a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Line.php
+++ b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Line.php
@@ -66,5 +66,4 @@ protected function _renderLineSettingsItems() {
 			esc_html__( 'Whether to guess the value of missing points. If yes, it will guess the value of any missing data based on neighboring points. If no, it will leave a break in the line at the unknown point.', 'visualizer' )
 		);
 	}
-
 }
diff --git a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Pie.php b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Pie.php
index 16c2a0840..17e4624bc 100644
--- a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Pie.php
+++ b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Pie.php
@@ -229,5 +229,4 @@ protected function _renderTooltipSettigns() {
 			esc_html__( 'Determines what information to display when the user hovers over a pie slice.', 'visualizer' )
 		);
 	}
-
 }
diff --git a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Scatter.php b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Scatter.php
index 7706d3369..ae1b4c534 100644
--- a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Scatter.php
+++ b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Scatter.php
@@ -60,5 +60,4 @@ protected function _toHTML() {
 		$this->_renderViewSettings();
 		$this->_renderAdvancedSettings();
 	}
-
 }
diff --git a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Tabular.php b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Tabular.php
index 163645c11..da1e2deea 100644
--- a/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Tabular.php
+++ b/classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Tabular.php
@@ -124,6 +124,9 @@ protected function _renderColumnarSettings() {
 					esc_html__( 'To enable paging through the data.', 'visualizer' )
 				);
 
+				$paging_enabled = ( isset( $this->pagination ) && 1 === $this->pagination ); // phpcs:ignore WordPress.PHP.StrictComparisons.LooseComparison
+			echo '<div class="viz-pagination-options"', ( $paging_enabled ? '' : ' style="display:none"' ), '>';
+
 				echo '<div class="viz-section-delimiter section-delimiter"></div>';
 
 				self::_renderTextItem(
@@ -134,7 +137,9 @@ protected function _renderColumnarSettings() {
 					'10'
 				);
 
-				echo '<div class="viz-section-delimiter section-delimiter"></div>';
+			echo '</div>';
+
+			echo '<div class="viz-section-delimiter section-delimiter"></div>';
 
 				self::_renderCheckboxItem(
 					esc_html__( 'Disable Sort', 'visualizer' ),
@@ -410,5 +415,4 @@ protected function _renderSeries( $index ) {
 	protected function _renderSeriesSettings() {
 		parent::_renderSeriesSettings();
 	}
-
 }
diff --git a/classes/Visualizer/Render/Templates.php b/classes/Visualizer/Render/Templates.php
index 26676e2af..d8998a66f 100644
--- a/classes/Visualizer/Render/Templates.php
+++ b/classes/Visualizer/Render/Templates.php
@@ -105,5 +105,4 @@ protected function _toHTML() {
 			$this->_renderTemplate( $template, $callback );
 		}
 	}
-
 }
diff --git a/classes/Visualizer/Source.php b/classes/Visualizer/Source.php
index 7b3d6b597..ecd186249 100644
--- a/classes/Visualizer/Source.php
+++ b/classes/Visualizer/Source.php
@@ -109,7 +109,7 @@ protected static function _validateTypes( $types ) {
 	 * @access public
 	 * @return string The name of source.
 	 */
-	public abstract function getSourceName();
+	abstract public function getSourceName();
 
 	/**
 	 * Fetches information from source, parses it and builds series and data arrays.
@@ -119,7 +119,7 @@ public abstract function getSourceName();
 	 * @abstract
 	 * @access public
 	 */
-	public abstract function fetch();
+	abstract public function fetch();
 
 	/**
 	 * Returns series parsed from source.
@@ -263,7 +263,7 @@ protected function _normalizeData( $data ) {
 	 *
 	 * @return string The converted data.
 	 */
-	protected final function toUTF8( $datum ) {
+	final protected function toUTF8( $datum ) {
 		if ( ! function_exists( 'mb_detect_encoding' ) || mb_detect_encoding( $datum ) !== 'ASCII' ) {
 			$datum = \ForceUTF8\Encoding::toUTF8( $datum );
 		}
@@ -280,7 +280,7 @@ protected final function toUTF8( $datum ) {
 	 *
 	 * @return array
 	 */
-	public static final function get_date_formats_if_exists( $series, $data ) {
+	final public static function get_date_formats_if_exists( $series, $data ) {
 		$date_formats = array();
 		$types = array();
 		$index = 0;
@@ -288,7 +288,7 @@ public static final function get_date_formats_if_exists( $series, $data ) {
 			if ( in_array( $column['type'], array( 'date', 'datetime', 'timeofday' ), true ) ) {
 				$types[] = array( 'index' => $index, 'type' => $column['type'] );
 			}
-			$index++;
+			++$index;
 		}
 
 		if ( ! $types ) {
@@ -474,6 +474,4 @@ private function _fetchDataFromEditableTable() {
 
 		return true;
 	}
-
-
 }
diff --git a/classes/Visualizer/Source/Csv.php b/classes/Visualizer/Source/Csv.php
index 796658646..5d4e91873 100644
--- a/classes/Visualizer/Source/Csv.php
+++ b/classes/Visualizer/Source/Csv.php
@@ -143,9 +143,10 @@ public function fetch() {
 			}
 
 			// fetch data
-			// phpcs:ignore WordPress.CodeAnalysis.AssignmentInCondition.FoundInWhileCondition
-			while ( ( $data = fgetcsv( $handle, 0, VISUALIZER_CSV_DELIMITER, VISUALIZER_CSV_ENCLOSURE ) ) !== false ) {
+			$data = fgetcsv( $handle, 0, VISUALIZER_CSV_DELIMITER, VISUALIZER_CSV_ENCLOSURE );
+			while ( $data !== false ) {
 				$this->_data[] = $this->_normalizeData( $data );
+				$data = fgetcsv( $handle, 0, VISUALIZER_CSV_DELIMITER, VISUALIZER_CSV_ENCLOSURE );
 			}
 
 			// close file handle
diff --git a/classes/Visualizer/Source/Csv/Remote.php b/classes/Visualizer/Source/Csv/Remote.php
index 3261133a1..e034ca15e 100644
--- a/classes/Visualizer/Source/Csv/Remote.php
+++ b/classes/Visualizer/Source/Csv/Remote.php
@@ -161,5 +161,4 @@ protected function _get_file_handle( $filename = false ) {
 
 		return ! is_wp_error( $this->_tmpfile ) ? parent::_get_file_handle( $this->_tmpfile ) : false;
 	}
-
 }
diff --git a/classes/Visualizer/Source/Json.php b/classes/Visualizer/Source/Json.php
index 2961cd3ba..027b4c0fc 100644
--- a/classes/Visualizer/Source/Json.php
+++ b/classes/Visualizer/Source/Json.php
@@ -321,7 +321,6 @@ private function collectCommonElements( $data ) {
 		}
 
 		return $rows;
-
 	}
 
 	/**
@@ -331,7 +330,7 @@ private function collectCommonElements( $data ) {
 	 *
 	 * @access private
 	 */
-	private function getNextPage( $array ) {
+	private function getNextPage( $data ) {
 		if ( empty( $this->_paging ) ) {
 			return null;
 		}
@@ -339,10 +338,10 @@ private function getNextPage( $array ) {
 		$root   = explode( self::TAG_SEPARATOR, $this->_paging );
 		// get rid of the first element as that is the faux root element indicator
 		array_shift( $root );
-		$leaf   = $array;
+		$leaf   = $data;
 		foreach ( $root as $tag ) {
 			if ( array_key_exists( $tag, $leaf ) ) {
-				$leaf = $array[ $tag ];
+				$leaf = $data[ $tag ];
 			} else {
 				// if the tag does not exist, we assume it is present in the 0th element of the current array.
 				// TODO: we may want to change this to a filter later.
@@ -362,19 +361,19 @@ private function getNextPage( $array ) {
 	 *
 	 * @access private
 	 */
-	private function getRootElements( $parent, $now, $root, $array ) {
-		if ( is_null( $array ) ) {
+	private function getRootElements( $parent_key, $now, $root, $data ) {
+		if ( is_null( $data ) ) {
 			return null;
 		}
 
-		$root[] = $parent;
-		foreach ( $array as $key => $value ) {
+		$root[] = $parent_key;
+		foreach ( $data as $key => $value ) {
 			if ( is_array( $value ) && ! empty( $value ) ) {
 				if ( ! is_numeric( $key ) ) {
-					$now = sprintf( '%s%s%s', $parent, self::TAG_SEPARATOR, $key );
+					$now = sprintf( '%s%s%s', $parent_key, self::TAG_SEPARATOR, $key );
 					$root[] = $now;
 				} else {
-					$now = $parent;
+					$now = $parent_key;
 				}
 				$root = $this->getRootElements( $now, $key, $root, $value );
 			}
@@ -442,7 +441,7 @@ private function connect( $url ) {
 			$this->_additional_headers = array_filter( $this->_additional_headers );
 			if ( ! empty( $this->_additional_headers ) ) {
 				$this->_additional_headers = array_map(
-					function( $headers ) {
+					function ( $headers ) {
 						$headers = explode( ':', $headers );
 						$headers = array_map( 'trim', $headers );
 						return $headers;
@@ -555,5 +554,4 @@ private function is_woocommerce_request( $url ) {
 	public function getSourceName() {
 		return __CLASS__;
 	}
-
 }
diff --git a/classes/Visualizer/Source/Query.php b/classes/Visualizer/Source/Query.php
index 9b9f6622e..b08798c8e 100644
--- a/classes/Visualizer/Source/Query.php
+++ b/classes/Visualizer/Source/Query.php
@@ -152,7 +152,8 @@ function ( $value ) {
 		$headers    = array();
 
 		// short circuit results for remote dbs.
-		if ( false !== ( $remote_results = apply_filters( 'visualizer_db_query_execute', false, $this->_query, $as_html, $results_as_numeric_array, $raw_results, $this->_chart_id, $this->_params ) ) ) {
+		$remote_results = apply_filters( 'visualizer_db_query_execute', false, $this->_query, $as_html, $results_as_numeric_array, $raw_results, $this->_chart_id, $this->_params );
+		if ( false !== $remote_results ) {
 			$error = $remote_results['error'];
 			if ( empty( $error ) ) {
 				$results = $remote_results['results'];
@@ -180,7 +181,7 @@ function ( $value ) {
 
 			if ( $wpdb->last_error ) {
 				$this->_error = $wpdb->last_error;
-				return [];
+				return array();
 			}
 
 			if ( $rows ) {
@@ -198,7 +199,7 @@ function ( $value ) {
 							}
 						}
 						$results[] = $result;
-						$row_num++;
+						++$row_num;
 					}
 				}
 
diff --git a/classes/Visualizer/Source/Query/Params.php b/classes/Visualizer/Source/Query/Params.php
index 0309a9916..528b23ec6 100644
--- a/classes/Visualizer/Source/Query/Params.php
+++ b/classes/Visualizer/Source/Query/Params.php
@@ -79,7 +79,7 @@ private function rearrange_columns_for_x_axis( $columns, $select, $tables ) {
 					}
 				}
 			}
-			$index++;
+			++$index;
 		}
 
 		if ( $first ) {
diff --git a/composer.json b/composer.json
index 841014c42..31a5cfe6e 100644
--- a/composer.json
+++ b/composer.json
@@ -33,8 +33,8 @@
   "scripts": {
     "format": "phpcbf --standard=phpcs.xml --report-summary --report-source",
     "lint": "phpcs --standard=phpcs.xml",
-    "phpstan": "phpstan",
-    "phpstan:generate:baseline": "phpstan --generate-baseline"
+    "phpstan": "phpstan --memory-limit=2G",
+    "phpstan:generate:baseline": "phpstan --generate-baseline --memory-limit=2G"
   },
   "minimum-stability": "dev",
   "prefer-stable": true,
@@ -48,10 +48,11 @@
     }
   },
   "require-dev": {
-    "wp-coding-standards/wpcs": "^2.3",
+    "wp-coding-standards/wpcs": "^3.3",
     "dealerdirect/phpcodesniffer-composer-installer": "^1.0.0",
     "phpcompatibility/phpcompatibility-wp": "*",
     "phpstan/phpstan": "^2.1",
-    "szepeviktor/phpstan-wordpress": "^2.0"
+    "szepeviktor/phpstan-wordpress": "^2.0",
+    "yoast/phpunit-polyfills": "^4.0"
   }
 }
diff --git a/composer.lock b/composer.lock
index 9d638f7d8..2becf81de 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "6e978a0b38c64a0f62a8ddadae59cfa2",
+    "content-hash": "f939ee5350ac149f2ec1e5fca3a9ec30",
     "packages": [
         {
             "name": "codeinwp/themeisle-sdk",
@@ -181,29 +181,29 @@
     "packages-dev": [
         {
             "name": "dealerdirect/phpcodesniffer-composer-installer",
-            "version": "v1.0.0",
+            "version": "v1.2.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/PHPCSStandards/composer-installer.git",
-                "reference": "4be43904336affa5c2f70744a348312336afd0da"
+                "reference": "845eb62303d2ca9b289ef216356568ccc075ffd1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/PHPCSStandards/composer-installer/zipball/4be43904336affa5c2f70744a348312336afd0da",
-                "reference": "4be43904336affa5c2f70744a348312336afd0da",
+                "url": "https://api.github.com/repos/PHPCSStandards/composer-installer/zipball/845eb62303d2ca9b289ef216356568ccc075ffd1",
+                "reference": "845eb62303d2ca9b289ef216356568ccc075ffd1",
                 "shasum": ""
             },
             "require": {
-                "composer-plugin-api": "^1.0 || ^2.0",
+                "composer-plugin-api": "^2.2",
                 "php": ">=5.4",
-                "squizlabs/php_codesniffer": "^2.0 || ^3.1.0 || ^4.0"
+                "squizlabs/php_codesniffer": "^3.1.0 || ^4.0"
             },
             "require-dev": {
-                "composer/composer": "*",
+                "composer/composer": "^2.2",
                 "ext-json": "*",
                 "ext-zip": "*",
-                "php-parallel-lint/php-parallel-lint": "^1.3.1",
-                "phpcompatibility/php-compatibility": "^9.0",
+                "php-parallel-lint/php-parallel-lint": "^1.4.0",
+                "phpcompatibility/php-compatibility": "^9.0 || ^10.0.0@dev",
                 "yoast/phpunit-polyfills": "^1.0"
             },
             "type": "composer-plugin",
@@ -222,9 +222,9 @@
             "authors": [
                 {
                     "name": "Franck Nijhof",
-                    "email": "franck.nijhof@dealerdirect.com",
-                    "homepage": "http://www.frenck.nl",
-                    "role": "Developer / IT Manager"
+                    "email": "opensource@frenck.dev",
+                    "homepage": "https://frenck.dev",
+                    "role": "Open source developer"
                 },
                 {
                     "name": "Contributors",
@@ -232,7 +232,6 @@
                 }
             ],
             "description": "PHP_CodeSniffer Standards Composer Installer Plugin",
-            "homepage": "http://www.dealerdirect.com",
             "keywords": [
                 "PHPCodeSniffer",
                 "PHP_CodeSniffer",
@@ -253,22 +252,347 @@
             ],
             "support": {
                 "issues": "https://github.com/PHPCSStandards/composer-installer/issues",
+                "security": "https://github.com/PHPCSStandards/composer-installer/security/policy",
                 "source": "https://github.com/PHPCSStandards/composer-installer"
             },
-            "time": "2023-01-05T11:28:13+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/PHPCSStandards",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/jrfnl",
+                    "type": "github"
+                },
+                {
+                    "url": "https://opencollective.com/php_codesniffer",
+                    "type": "open_collective"
+                },
+                {
+                    "url": "https://thanks.dev/u/gh/phpcsstandards",
+                    "type": "thanks_dev"
+                }
+            ],
+            "time": "2025-11-11T04:32:07+00:00"
+        },
+        {
+            "name": "doctrine/instantiator",
+            "version": "1.5.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/instantiator.git",
+                "reference": "0a0fa9780f5d4e507415a065172d26a98d02047b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/0a0fa9780f5d4e507415a065172d26a98d02047b",
+                "reference": "0a0fa9780f5d4e507415a065172d26a98d02047b",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1 || ^8.0"
+            },
+            "require-dev": {
+                "doctrine/coding-standard": "^9 || ^11",
+                "ext-pdo": "*",
+                "ext-phar": "*",
+                "phpbench/phpbench": "^0.16 || ^1",
+                "phpstan/phpstan": "^1.4",
+                "phpstan/phpstan-phpunit": "^1",
+                "phpunit/phpunit": "^7.5 || ^8.5 || ^9.5",
+                "vimeo/psalm": "^4.30 || ^5.4"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Doctrine\\Instantiator\\": "src/Doctrine/Instantiator/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Marco Pivetta",
+                    "email": "ocramius@gmail.com",
+                    "homepage": "https://ocramius.github.io/"
+                }
+            ],
+            "description": "A small, lightweight utility to instantiate objects in PHP without invoking their constructors",
+            "homepage": "https://www.doctrine-project.org/projects/instantiator.html",
+            "keywords": [
+                "constructor",
+                "instantiate"
+            ],
+            "support": {
+                "issues": "https://github.com/doctrine/instantiator/issues",
+                "source": "https://github.com/doctrine/instantiator/tree/1.5.0"
+            },
+            "funding": [
+                {
+                    "url": "https://www.doctrine-project.org/sponsorship.html",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://www.patreon.com/phpdoctrine",
+                    "type": "patreon"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/doctrine%2Finstantiator",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-12-30T00:15:36+00:00"
+        },
+        {
+            "name": "myclabs/deep-copy",
+            "version": "1.13.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/myclabs/DeepCopy.git",
+                "reference": "07d290f0c47959fd5eed98c95ee5602db07e0b6a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/07d290f0c47959fd5eed98c95ee5602db07e0b6a",
+                "reference": "07d290f0c47959fd5eed98c95ee5602db07e0b6a",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1 || ^8.0"
+            },
+            "conflict": {
+                "doctrine/collections": "<1.6.8",
+                "doctrine/common": "<2.13.3 || >=3 <3.2.2"
+            },
+            "require-dev": {
+                "doctrine/collections": "^1.6.8",
+                "doctrine/common": "^2.13.3 || ^3.2.2",
+                "phpspec/prophecy": "^1.10",
+                "phpunit/phpunit": "^7.5.20 || ^8.5.23 || ^9.5.13"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "src/DeepCopy/deep_copy.php"
+                ],
+                "psr-4": {
+                    "DeepCopy\\": "src/DeepCopy/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "Create deep copies (clones) of your objects",
+            "keywords": [
+                "clone",
+                "copy",
+                "duplicate",
+                "object",
+                "object graph"
+            ],
+            "support": {
+                "issues": "https://github.com/myclabs/DeepCopy/issues",
+                "source": "https://github.com/myclabs/DeepCopy/tree/1.13.4"
+            },
+            "funding": [
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/myclabs/deep-copy",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-08-01T08:46:24+00:00"
+        },
+        {
+            "name": "nikic/php-parser",
+            "version": "v5.7.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/nikic/PHP-Parser.git",
+                "reference": "dca41cd15c2ac9d055ad70dbfd011130757d1f82"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/dca41cd15c2ac9d055ad70dbfd011130757d1f82",
+                "reference": "dca41cd15c2ac9d055ad70dbfd011130757d1f82",
+                "shasum": ""
+            },
+            "require": {
+                "ext-ctype": "*",
+                "ext-json": "*",
+                "ext-tokenizer": "*",
+                "php": ">=7.4"
+            },
+            "require-dev": {
+                "ircmaxell/php-yacc": "^0.0.7",
+                "phpunit/phpunit": "^9.0"
+            },
+            "bin": [
+                "bin/php-parse"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "5.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "PhpParser\\": "lib/PhpParser"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Nikita Popov"
+                }
+            ],
+            "description": "A PHP parser written in PHP",
+            "keywords": [
+                "parser",
+                "php"
+            ],
+            "support": {
+                "issues": "https://github.com/nikic/PHP-Parser/issues",
+                "source": "https://github.com/nikic/PHP-Parser/tree/v5.7.0"
+            },
+            "time": "2025-12-06T11:56:16+00:00"
+        },
+        {
+            "name": "phar-io/manifest",
+            "version": "2.0.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phar-io/manifest.git",
+                "reference": "54750ef60c58e43759730615a392c31c80e23176"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phar-io/manifest/zipball/54750ef60c58e43759730615a392c31c80e23176",
+                "reference": "54750ef60c58e43759730615a392c31c80e23176",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-libxml": "*",
+                "ext-phar": "*",
+                "ext-xmlwriter": "*",
+                "phar-io/version": "^3.0.1",
+                "php": "^7.2 || ^8.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Heuer",
+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Component for reading phar.io manifest information from a PHP Archive (PHAR)",
+            "support": {
+                "issues": "https://github.com/phar-io/manifest/issues",
+                "source": "https://github.com/phar-io/manifest/tree/2.0.4"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/theseer",
+                    "type": "github"
+                }
+            ],
+            "time": "2024-03-03T12:33:53+00:00"
+        },
+        {
+            "name": "phar-io/version",
+            "version": "3.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phar-io/version.git",
+                "reference": "4f7fd7836c6f332bb2933569e566a0d6c4cbed74"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phar-io/version/zipball/4f7fd7836c6f332bb2933569e566a0d6c4cbed74",
+                "reference": "4f7fd7836c6f332bb2933569e566a0d6c4cbed74",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2 || ^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Heuer",
+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Library for handling version information and constraints",
+            "support": {
+                "issues": "https://github.com/phar-io/version/issues",
+                "source": "https://github.com/phar-io/version/tree/3.2.1"
+            },
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                 "type": "zip",
-                "url": "https://api.github.com/repos/szepeviktor/phpstan-wordpress/zipball/963887b04c21fe7ac78e61c1351f8b00fff9f8f8",
-                "reference": "963887b04c21fe7ac78e61c1351f8b00fff9f8f8",
+                "url": "https://api.github.com/repos/szepeviktor/phpstan-wordpress/zipball/aa722f037b2d034828cd6c55ebe9e5c74961927e",
+                "reference": "aa722f037b2d034828cd6c55ebe9e5c74961927e",
                 "shasum": ""
             },
             "require": {
@@ -671,6 +2615,7 @@
             },
             "require-dev": {
                 "composer/composer": "^2.1.14",
+                "composer/semver": "^3.4",
                 "dealerdirect/phpcodesniffer-composer-installer": "^1.0",
                 "php-parallel-lint/php-parallel-lint": "^1.1",
                 "phpstan/phpstan-strict-rules": "^2.0",
@@ -708,36 +2653,94 @@
             ],
             "support": {
                 "issues": "https://github.com/szepeviktor/phpstan-wordpress/issues",
-                "source": "https://github.com/szepeviktor/phpstan-wordpress/tree/v2.0.2"
+                "source": "https://github.com/szepeviktor/phpstan-wordpress/tree/v2.0.3"
+            },
+            "time": "2025-09-14T02:58:22+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "1.3.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "b7489ce515e168639d17feec34b8847c326b0b3c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/b7489ce515e168639d17feec34b8847c326b0b3c",
+                "reference": "b7489ce515e168639d17feec34b8847c326b0b3c",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^7.2 || ^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "support": {
+                "issues": "https://github.com/theseer/tokenizer/issues",
+                "source": "https://github.com/theseer/tokenizer/tree/1.3.1"
             },
-            "time": "2025-02-12T18:43:37+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/theseer",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-11-17T20:03:58+00:00"
         },
         {
             "name": "wp-coding-standards/wpcs",
-            "version": "2.3.0",
+            "version": "3.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/WordPress/WordPress-Coding-Standards.git",
-                "reference": "7da1894633f168fe244afc6de00d141f27517b62"
+                "reference": "7795ec6fa05663d716a549d0b44e47ffc8b0d4a6"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/WordPress/WordPress-Coding-Standards/zipball/7da1894633f168fe244afc6de00d141f27517b62",
-                "reference": "7da1894633f168fe244afc6de00d141f27517b62",
+                "url": "https://api.github.com/repos/WordPress/WordPress-Coding-Standards/zipball/7795ec6fa05663d716a549d0b44e47ffc8b0d4a6",
+                "reference": "7795ec6fa05663d716a549d0b44e47ffc8b0d4a6",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.4",
-                "squizlabs/php_codesniffer": "^3.3.1"
+                "ext-filter": "*",
+                "ext-libxml": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlreader": "*",
+                "php": ">=7.2",
+                "phpcsstandards/phpcsextra": "^1.5.0",
+                "phpcsstandards/phpcsutils": "^1.1.0",
+                "squizlabs/php_codesniffer": "^3.13.4"
             },
             "require-dev": {
-                "dealerdirect/phpcodesniffer-composer-installer": "^0.5 || ^0.6",
-                "phpcompatibility/php-compatibility": "^9.0",
-                "phpcsstandards/phpcsdevtools": "^1.0",
-                "phpunit/phpunit": "^4.0 || ^5.0 || ^6.0 || ^7.0"
+                "php-parallel-lint/php-console-highlighter": "^1.0.0",
+                "php-parallel-lint/php-parallel-lint": "^1.4.0",
+                "phpcompatibility/php-compatibility": "^10.0.0@dev",
+                "phpcsstandards/phpcsdevtools": "^1.2.0",
+                "phpunit/phpunit": "^8.0 || ^9.0"
             },
             "suggest": {
-                "dealerdirect/phpcodesniffer-composer-installer": "^0.6 || This Composer plugin will sort out the PHPCS 'installed_paths' automatically."
+                "ext-iconv": "For improved results",
+                "ext-mbstring": "For improved results"
             },
             "type": "phpcodesniffer-standard",
             "notification-url": "https://packagist.org/downloads/",
@@ -754,6 +2757,7 @@
             "keywords": [
                 "phpcs",
                 "standards",
+                "static analysis",
                 "wordpress"
             ],
             "support": {
@@ -761,7 +2765,76 @@
                 "source": "https://github.com/WordPress/WordPress-Coding-Standards",
                 "wiki": "https://github.com/WordPress/WordPress-Coding-Standards/wiki"
             },
-            "time": "2020-05-13T23:57:56+00:00"
+            "funding": [
+                {
+                    "url": "https://opencollective.com/php_codesniffer",
+                    "type": "custom"
+                }
+            ],
+            "time": "2025-11-25T12:08:04+00:00"
+        },
+        {
+            "name": "yoast/phpunit-polyfills",
+            "version": "4.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/Yoast/PHPUnit-Polyfills.git",
+                "reference": "134921bfca9b02d8f374c48381451da1d98402f9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/Yoast/PHPUnit-Polyfills/zipball/134921bfca9b02d8f374c48381451da1d98402f9",
+                "reference": "134921bfca9b02d8f374c48381451da1d98402f9",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1",
+                "phpunit/phpunit": "^7.5 || ^8.0 || ^9.0 || ^11.0 || ^12.0"
+            },
+            "require-dev": {
+                "php-parallel-lint/php-console-highlighter": "^1.0.0",
+                "php-parallel-lint/php-parallel-lint": "^1.4.0",
+                "yoast/yoastcs": "^3.1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "4.x-dev"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "phpunitpolyfills-autoload.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Team Yoast",
+                    "email": "support@yoast.com",
+                    "homepage": "https://yoast.com"
+                },
+                {
+                    "name": "Contributors",
+                    "homepage": "https://github.com/Yoast/PHPUnit-Polyfills/graphs/contributors"
+                }
+            ],
+            "description": "Set of polyfills for changed PHPUnit functionality to allow for creating PHPUnit cross-version compatible tests",
+            "homepage": "https://github.com/Yoast/PHPUnit-Polyfills",
+            "keywords": [
+                "phpunit",
+                "polyfill",
+                "testing"
+            ],
+            "support": {
+                "issues": "https://github.com/Yoast/PHPUnit-Polyfills/issues",
+                "security": "https://github.com/Yoast/PHPUnit-Polyfills/security/policy",
+                "source": "https://github.com/Yoast/PHPUnit-Polyfills"
+            },
+            "time": "2025-02-09T18:58:54+00:00"
         }
     ],
     "aliases": [],
@@ -774,5 +2847,5 @@
     "platform-overrides": {
         "php": "7.4"
     },
-    "plugin-api-version": "2.6.0"
+    "plugin-api-version": "2.9.0"
 }
diff --git a/css/frame.css b/css/frame.css
index 4dcef45df..65c73f66a 100644
--- a/css/frame.css
+++ b/css/frame.css
@@ -53,17 +53,17 @@
 /******************************************************************************/
 
 #sidebar {
-	overflow: auto;
+	overflow-x: hidden;
+	overflow-y: auto;
 	position: absolute;
-	z-index: 75;
+	z-index: 80;
 	top: 0;
 	right: 0;
 	bottom: 60px;
 	width: 350px;
 	border-left: 1px solid #dfdfdf;
 	background: whitesmoke;
-
-	-webkit-overflow-scrolling: touch;
+	overscroll-behavior: contain;
 }
 
 .viz-group {
@@ -1113,12 +1113,14 @@ button#editor-chart-button {
 	left: 0;
 	width: 100%;
 	opacity: 0;
+	pointer-events: none;
 	background: rgba(253,253,253,0.9);
 	transition: 0.5s ease;
 }
 
 .only-pro-feature:hover .only-pro-content {
 	opacity: 1;
+	pointer-events: auto;
 }
 
 .only-pro-container {
@@ -1134,10 +1136,11 @@ button#editor-chart-button {
 	flex-direction: column;
 	align-items: center;
 	justify-content: center;
+	gap: 12px;
 }
 
 .only-pro-content p {
-	margin: 0 0 15px;
+	margin: 0;
 	font-size: 14px;
 	font-weight: 700;
 }
@@ -1154,9 +1157,6 @@ button#editor-chart-button {
 	border-style: solid;
 	border-radius: 3px;
 }
-.only-pro-content .only-pro-container a {
-	color: #fff !important;
-}
 
 .only-pro-content a:hover {
 	background: #2D419B;
diff --git a/index.php b/index.php
index 484de429f..41f50ffb1 100644
--- a/index.php
+++ b/index.php
@@ -36,15 +36,15 @@
  *
  * @since 1.0.0
  *
- * @param string $class The class name to autoload.
+ * @param string $class_name The class name to autoload.
  *
  * @return boolean Returns TRUE if the class is located. Otherwise FALSE.
  */
-function visualizer_autoloader( $class ) {
+function visualizer_autoloader( $class_name ) {
 	$namespaces = array( 'Visualizer' );
 	foreach ( $namespaces as $namespace ) {
-		if ( substr( $class, 0, strlen( $namespace ) ) === $namespace ) {
-			$filename = dirname( __FILE__ ) . str_replace( '_', DIRECTORY_SEPARATOR, "_classes_{$class}.php" );
+		if ( substr( $class_name, 0, strlen( $namespace ) ) === $namespace ) {
+			$filename = __DIR__ . str_replace( '_', DIRECTORY_SEPARATOR, "_classes_{$class_name}.php" );
 			if ( is_readable( $filename ) ) {
 				require $filename;
 
@@ -66,7 +66,7 @@ function visualizer_launch() {
 	define( 'VISUALIZER_BASEFILE', __FILE__ );
 	define( 'VISUALIZER_BASENAME', plugin_basename( __FILE__ ) );
 	define( 'VISUALIZER_ABSURL', plugins_url( '/', __FILE__ ) );
-	define( 'VISUALIZER_ABSPATH', dirname( __FILE__ ) );
+	define( 'VISUALIZER_ABSPATH', __DIR__ );
 	define( 'VISUALIZER_DIRNAME', basename( VISUALIZER_ABSPATH ) );
 	define( 'VISUALIZER_REST_VERSION', 1 );
 	// if the below is true, then the js/customization.js in the plugin folder will be used instead of the one in the uploads folder (if it exists).
@@ -133,7 +133,7 @@ function visualizer_launch() {
 
 	$vendor_file = VISUALIZER_ABSPATH . '/vendor/autoload.php';
 	if ( is_readable( $vendor_file ) ) {
-		include_once( $vendor_file );
+		include_once $vendor_file;
 	}
 	add_filter( 'themeisle_sdk_products', 'visualizer_register_sdk', 10, 1 );
 	add_filter( 'pirate_parrot_log', 'visualizer_register_parrot', 10, 1 );
@@ -149,7 +149,7 @@ function visualizer_launch() {
 	);
 	add_filter(
 		'visualizer_about_us_metadata',
-		function() {
+		function () {
 			return array(
 				'logo'             => esc_url( VISUALIZER_ABSURL . 'images/visualizer-logo.svg' ),
 				'location'         => 'visualizer',
@@ -164,12 +164,12 @@ function() {
 		add_filter( 'themeisle_sdk_enable_telemetry', '__return_true' );
 		add_filter(
 			'themeisle_sdk_telemetry_products',
-			function( $products ) {
+			function ( $products ) {
 				$already_registered = false;
 
 				$license = get_option( 'visualizer_pro_license_data', 'free' );
 				if ( ! empty( $license ) && is_object( $license ) ) {
-					$license = $license->key;
+					$license = $license->key ?? 'free';
 				}
 				$track_hash = 'free' === $license ? 'free' : wp_hash( $license );
 
diff --git a/js/frame.js b/js/frame.js
index 95abd0ed7..592244d80 100644
--- a/js/frame.js
+++ b/js/frame.js
@@ -100,8 +100,9 @@
         // collapse other open subsections of this section
         $(document).on('click', '.viz-section-title', function () {
             var grandparent = $(this).parent().parent();
-            grandparent.find('.viz-section-title.open ~ .viz-section-items').hide();
-            grandparent.find('.viz-section-title.open').removeClass('open');
+            grandparent.find('.viz-section-title.open').not(this).each(function () {
+                $(this).removeClass('open').siblings('.viz-section-items').hide();
+            });
         });
 
         $('#view-remote-file').click(function () {
diff --git a/js/preview.js b/js/preview.js
index 90768cf51..877ecd968 100644
--- a/js/preview.js
+++ b/js/preview.js
@@ -187,6 +187,10 @@
 		});
 		$('textarea[name="manual"]').change(validateJSON).keyup(validateJSON);
 
+		$(document).on('change', 'input[name="paging_bool"], input[name="pagination"]', function() {
+			$('.viz-pagination-options').toggle($(this).is(':checked'));
+		});
+
 	});
 })(jQuery, visualizer);
 
diff --git a/js/render-chartjs.js b/js/render-chartjs.js
index 251f92e4d..04f782d3b 100644
--- a/js/render-chartjs.js
+++ b/js/render-chartjs.js
@@ -148,6 +148,8 @@
             }
         };
 
+        override(settings, chart);
+
         var chartjs = new Chart(context, {
             type: type,
             data: {
@@ -234,8 +236,6 @@
         }
 
         handleAxes(settings, chart);
-
-        override(settings, chart);
     }
 
     function handleAxes(settings, chart){
@@ -501,7 +501,7 @@
         if (settings.manual) {
             try{
                 var options = JSON.parse(settings.manual);
-                $.extend(settings, options);
+                $.extend(true, settings, options);
                 delete settings.manual;
             }catch(error){
                 console.error("Error while adding manual configuration override " + settings.manual);
diff --git a/js/render-facade.js b/js/render-facade.js
index 5dfc069a0..9ff2a90c9 100644
--- a/js/render-facade.js
+++ b/js/render-facade.js
@@ -1,7 +1,8 @@
 /* global console */
 /* global visualizer */
 /* global jQuery */
-var vizClipboard1=null;
+window['vizClipboard1'] = window['vizClipboard1'] || null;
+window['vizClipboard2'] = window['vizClipboard2'] || null;
 (function($, visualizer){
     
     function initActionsButtons(v) {
@@ -13,12 +14,12 @@ var vizClipboard1=null;
             });
         }
 
-        if($('a.visualizer-action[data-visualizer-type=copy]').length > 0) {
+        if($('a.visualizer-action[data-visualizer-type=copy]').length > 0 && vizClipboard2 === null) {
             $('a.visualizer-action[data-visualizer-type=copy]').on('click', function(e) {
                 e.preventDefault();
             });
-            var clipboard = new ClipboardJS('a.visualizer-action[data-visualizer-type=copy]'); // jshint ignore:line
-            clipboard.on('success', function(e) {
+            vizClipboard2 = new ClipboardJS('a.visualizer-action[data-visualizer-type=copy]'); // jshint ignore:line
+            vizClipboard2.on('success', function(e) {
                 window.alert(v.i10n['copied']);
             });
         }
diff --git a/js/render-google.js b/js/render-google.js
index 3cdcd475f..18ac617b9 100644
--- a/js/render-google.js
+++ b/js/render-google.js
@@ -31,12 +31,17 @@ var isResizeRequest = false;
         // remember, some charts do not support annotations so they should not be included in this.
         var no_annotation_charts = ['tabular', 'timeline', 'gauge', 'geo', 'bubble', 'candlestick'];
         if ( undefined !== chart.settings && undefined !== chart.settings.series && undefined === chart.settings.series.length ) {
-            var chartSeries = [];
-            var chartSeriesValue = Object.values( chart.settings.series );
-            $.each( Object.keys( chart.settings.series ), function( index, element ) {
-                chartSeries[element] = chartSeriesValue[index];
-            } );
-            chart.settings.series = chartSeries;
+            var seriesKeys = Object.keys( chart.settings.series );
+            // Only convert when keys are numeric indices (PHP JSON-encoded array).
+            // String keys (e.g. named series from manual config) must be left as-is.
+            if ( seriesKeys.every( function( k ) { return ! isNaN( k ); } ) ) {
+                var chartSeries = [];
+                var chartSeriesValue = Object.values( chart.settings.series );
+                $.each( seriesKeys, function( index, element ) {
+                    chartSeries[ element ] = chartSeriesValue[ index ];
+                } );
+                chart.settings.series = chartSeries;
+            }
         }
         if(id !== 'canvas' && typeof chart.series !== 'undefined' && typeof chart.settings.series !== 'undefined' && ! no_annotation_charts.includes(chart.type) ) {
             hasAnnotation = chart.series.length - chart.settings.series.length > 1;
@@ -444,19 +449,30 @@ var isResizeRequest = false;
         }
 
         var formatter = null;
-        switch (type) {
-            case 'number':
-                formatter = new gv.NumberFormat({pattern: format});
-                break;
-            case 'date':
-            case 'datetime':
-            case 'timeofday':
-                formatter = new gv.DateFormat({pattern: format});
-                break;
-        }
+        var $formatInput = $('input.control-text[name*="[format]"]').filter(function() {
+            return $(this).val() === format;
+        });
+        try {
+            switch (type) {
+                case 'number':
+                    formatter = new gv.NumberFormat({pattern: format});
+                    break;
+                case 'date':
+                case 'datetime':
+                case 'timeofday':
+                    formatter = new gv.DateFormat({pattern: format});
+                    break;
+            }
 
-        if (formatter) {
-            formatter.format(table, index);
+            if (formatter) {
+                formatter.format(table, index);
+                $formatInput.nextAll('.visualizer-format-error').remove();
+            }
+        } catch (e) {
+            if ($formatInput.length) {
+                $formatInput.nextAll('.visualizer-format-error').remove();
+                $('<p class="visualizer-format-error" style="color:#cc0000;margin:4px 0 0"></p>').text(visualizer.l10n.invalid_format).insertAfter($formatInput);
+            }
         }
 
         var arr = id.split('-');
diff --git a/js/simple-editor.js b/js/simple-editor.js
index 109b486df..31094f283 100644
--- a/js/simple-editor.js
+++ b/js/simple-editor.js
@@ -30,6 +30,7 @@
                 button.html( button.attr( 'data-t-chart' ) );
                 button.attr( 'data-current', 'chart' );
                 $('p.viz-editor-selection').show();
+                $('p.viz-info-msg').hide();
                 $('.viz-text-editor').hide();
                 $('.viz-simple-editor').hide();
                 $( '#canvas' ).css('z-index', '1').show();
@@ -40,6 +41,7 @@
             button.html( button.attr( 'data-t-editor' ) );
             button.attr( 'data-current', 'editor' );
             $('p.viz-editor-selection').hide();
+            $('p.viz-info-msg').show();
             $('.viz-text-editor').css('z-index', '9999').show();
             $('.viz-simple-editor').css('z-index', '9999').show();
             $( '#canvas' ).css('z-index', '-100').hide();
@@ -53,6 +55,7 @@
             button.html( button.attr( 'data-t-chart' ) );
             button.attr( 'data-current', 'chart' );
             $('p.viz-editor-selection').show();
+            $('p.viz-info-msg').hide();
             $('.viz-text-editor').hide();
             $('.viz-simple-editor').hide();
             $( '#canvas' ).css('z-index', '1').show();
@@ -74,6 +77,7 @@
                 button.html( button.attr( 'data-t-chart' ) );
                 button.attr( 'data-current', 'chart' );
                 $('p.viz-editor-selection').show();
+                $('p.viz-info-msg').hide();
                 $('.viz-table-editor').hide();
                 $('.viz-simple-editor').hide();
                 $( '#canvas' ).css('z-index', '1').show();
@@ -84,6 +88,7 @@
             button.html( button.attr( 'data-t-editor' ) );
             button.attr( 'data-current', 'editor' );
             $('p.viz-editor-selection').hide();
+            $('p.viz-info-msg').show();
             $( '.viz-table-editor' ).css("z-index", "9999").show();
             $('.viz-simple-editor').css('z-index', '9999').show();
             $('body').trigger('visualizer:db:editor:table:redraw', {});
@@ -98,6 +103,7 @@
             button.html( button.attr( 'data-t-chart' ) );
             button.attr( 'data-current', 'chart' );
             $('p.viz-editor-selection').show();
+            $('p.viz-info-msg').hide();
             $('.viz-table-editor').hide();
             $('.viz-simple-editor').hide();
             $( '#canvas' ).css('z-index', '1').show();
diff --git a/package-lock.json b/package-lock.json
index 05915e6f7..0be3f3826 100755
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "visualizer",
-  "version": "3.11.14",
+  "version": "3.11.15",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "visualizer",
-      "version": "3.11.14",
+      "version": "3.11.15",
       "license": "GPL-2.0+",
       "devDependencies": {
         "@semantic-release/changelog": "^5.0.1",
@@ -16,6 +16,8 @@
         "@wordpress/env": "^11.0.0",
         "@wordpress/scripts": "^27.4.0",
         "conventional-changelog-simple-preset": "^1.0.15",
+        "grunt": "^1.6.1",
+        "grunt-cli": "^1.5.0",
         "grunt-version": "^2.0.0",
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     "os-tmpdir": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/os-tmpdir/-/os-tmpdir-1.0.2.tgz",
-      "integrity": "sha1-u+Z0BseaqFxc/sdm/lc0VV36EnQ=",
+      "integrity": "sha512-D2FR03Vir7FIu45XBY20mTb+/ZSWB00sjU9jdQXt83gDrI4Ztz5Fs7/yy74g2N5SVQY4xY1qDr4rNddwYRVX0g==",
       "dev": true
     },
     "osenv": {
@@ -55495,13 +55607,10 @@
       }
     },
     "v8flags": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.2.0.tgz",
-      "integrity": "sha512-mH8etigqMfiGWdeXpaaqGfs6BndypxusHHcv2qSHyZkGEznCd/qAXCWWRzeowtL54147cktFOC4P5y+kl8d8Jg==",
-      "dev": true,
-      "requires": {
-        "homedir-polyfill": "^1.0.1"
-      }
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-4.0.1.tgz",
+      "integrity": "sha512-fcRLaS4H/hrZk9hYwbdRM35D0U8IYMfEClhXxCivOojl+yTRAZH3Zy2sSy6qVCiGbV9YAtPssP6jaChqC9vPCg==",
+      "dev": true
     },
     "validate-npm-package-license": {
       "version": "3.0.4",
diff --git a/package.json b/package.json
index 6295b182b..19943cbad 100755
--- a/package.json
+++ b/package.json
@@ -22,6 +22,7 @@
     "env:up": "export DOCKER_FILE=docker-compose.ci.yml && bash bin/wp-init.sh",
     "env:down": "export DOCKER_FILE=docker-compose.ci.yml && bash bin/wp-down.sh",
     "wp-env": "wp-env",
+    "grunt": "grunt",
     "test:env:start": "wp-env start",
     "test:env:stop": "wp-env stop",
     "test:env:clean": "wp-env clean",
@@ -41,6 +42,8 @@
     "@wordpress/env": "^11.0.0",
     "@wordpress/scripts": "^27.4.0",
     "conventional-changelog-simple-preset": "^1.0.15",
+    "grunt": "^1.6.1",
+    "grunt-cli": "^1.5.0",
     "grunt-version": "^2.0.0",
     "grunt-wp-readme-to-markdown": "^2.0.1",
     "load-project-config": "~0.2.1",
diff --git a/phpstan-baseline.neon b/phpstan-baseline.neon
index a96b74d51..2b3373401 100644
--- a/phpstan-baseline.neon
+++ b/phpstan-baseline.neon
@@ -7,7 +7,7 @@ parameters:
 			path: classes/Visualizer/Gutenberg/Block.php
 
 		-
-			message: '#^Call to function is_wp_error\(\) with string will always evaluate to false\.$#'
+			message: '#^Call to function is_wp_error\(\) with non\-empty\-string will always evaluate to false\.$#'
 			identifier: function.impossibleType
 			count: 1
 			path: classes/Visualizer/Gutenberg/Block.php
@@ -36,12 +36,6 @@ parameters:
 			count: 1
 			path: classes/Visualizer/Gutenberg/Block.php
 
-		-
-			message: '#^Method Visualizer_Gutenberg_Block\:\:add_rest_query_vars\(\) has parameter \$request with generic class WP_REST_Request but does not specify its types\: T$#'
-			identifier: missingType.generics
-			count: 1
-			path: classes/Visualizer/Gutenberg/Block.php
-
 		-
 			message: '#^Method Visualizer_Gutenberg_Block\:\:enqueue_gutenberg_scripts\(\) has no return type specified\.$#'
 			identifier: missingType.return
@@ -204,6 +198,12 @@ parameters:
 			count: 1
 			path: classes/Visualizer/Gutenberg/Block.php
 
+		-
+			message: '#^Unable to resolve the template type TUrl in call to function wp_http_validate_url$#'
+			identifier: argument.templateType
+			count: 1
+			path: classes/Visualizer/Gutenberg/Block.php
+
 		-
 			message: '#^Constant VISUALIZER_PRO_VERSION not found\.$#'
 			identifier: constant.notFound
@@ -295,7 +295,7 @@ parameters:
 			path: classes/Visualizer/Module.php
 
 		-
-			message: '#^Method Visualizer_Module\:\:getDataAs\(\) has parameter \$final with no type specified\.$#'
+			message: '#^Method Visualizer_Module\:\:getDataAs\(\) has parameter \$data with no type specified\.$#'
 			identifier: missingType.parameter
 			count: 1
 			path: classes/Visualizer/Module.php
@@ -1386,6 +1386,12 @@ parameters:
 			count: 1
 			path: classes/Visualizer/Module/Chart.php
 
+		-
+			message: '#^Unable to resolve the template type TUrl in call to function wp_http_validate_url$#'
+			identifier: argument.templateType
+			count: 1
+			path: classes/Visualizer/Module/Chart.php
+
 		-
 			message: '#^Undefined variable\: \$atts$#'
 			identifier: variable.undefined
@@ -1512,12 +1518,6 @@ parameters:
 			count: 1
 			path: classes/Visualizer/Module/Frontend.php
 
-		-
-			message: '#^Method Visualizer_Module_Frontend\:\:perform_action\(\) has parameter \$params with generic class WP_REST_Request but does not specify its types\: T$#'
-			identifier: missingType.generics
-			count: 1
-			path: classes/Visualizer/Module/Frontend.php
-
 		-
 			message: '#^Method Visualizer_Module_Frontend\:\:printFooterScripts\(\) has no return type specified\.$#'
 			identifier: missingType.return
@@ -2034,12 +2034,6 @@ parameters:
 			count: 1
 			path: classes/Visualizer/Module/Wizard.php
 
-		-
-			message: '#^Path in include_once\(\) "\./wp\-admin/includes/plugin\-install\.php" is not a file or it does not exist\.$#'
-			identifier: includeOnce.fileNotFound
-			count: 1
-			path: classes/Visualizer/Module/Wizard.php
-
 		-
 			message: '#^Property Visualizer_Module_Wizard\:\:\$wizard_data has no type specified\.$#'
 			identifier: missingType.property
@@ -2743,7 +2737,7 @@ parameters:
 			path: classes/Visualizer/Render/Sidebar.php
 
 		-
-			message: '#^Method Visualizer_Render_Sidebar\:\:_renderCheckboxItem\(\) has parameter \$default with no type specified\.$#'
+			message: '#^Method Visualizer_Render_Sidebar\:\:_renderCheckboxItem\(\) has parameter \$default_value with no type specified\.$#'
 			identifier: missingType.parameter
 			count: 1
 			path: classes/Visualizer/Render/Sidebar.php
@@ -3421,7 +3415,7 @@ parameters:
 			path: classes/Visualizer/Render/Sidebar/Graph.php
 
 		-
-			message: '#^Parameter \#4 \$default of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
+			message: '#^Parameter \#4 \$default_color of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
 			identifier: argument.type
 			count: 3
 			path: classes/Visualizer/Render/Sidebar/Graph.php
@@ -3517,7 +3511,7 @@ parameters:
 			path: classes/Visualizer/Render/Sidebar/Linear.php
 
 		-
-			message: '#^Parameter \#4 \$default of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
+			message: '#^Parameter \#4 \$default_color of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
 			identifier: argument.type
 			count: 1
 			path: classes/Visualizer/Render/Sidebar/Linear.php
@@ -3547,7 +3541,7 @@ parameters:
 			path: classes/Visualizer/Render/Sidebar/Type/ChartJS/Bar.php
 
 		-
-			message: '#^Parameter \#4 \$default of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
+			message: '#^Parameter \#4 \$default_color of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
 			identifier: argument.type
 			count: 3
 			path: classes/Visualizer/Render/Sidebar/Type/ChartJS/Bar.php
@@ -3583,7 +3577,7 @@ parameters:
 			path: classes/Visualizer/Render/Sidebar/Type/ChartJS/Line.php
 
 		-
-			message: '#^Parameter \#4 \$default of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
+			message: '#^Parameter \#4 \$default_color of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
 			identifier: argument.type
 			count: 2
 			path: classes/Visualizer/Render/Sidebar/Type/ChartJS/Line.php
@@ -3691,7 +3685,7 @@ parameters:
 			path: classes/Visualizer/Render/Sidebar/Type/ChartJS/Pie.php
 
 		-
-			message: '#^Parameter \#4 \$default of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
+			message: '#^Parameter \#4 \$default_color of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
 			identifier: argument.type
 			count: 4
 			path: classes/Visualizer/Render/Sidebar/Type/ChartJS/Pie.php
@@ -3702,168 +3696,6 @@ parameters:
 			count: 1
 			path: classes/Visualizer/Render/Sidebar/Type/ChartJS/Pie.php
 
-		-
-			message: '#^Access to an undefined property Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:\$__series\.$#'
-			identifier: property.notFound
-			count: 2
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Access to an undefined property Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:\$_includeCurveTypes\.$#'
-			identifier: property.notFound
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Access to an undefined property Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:\$description\.$#'
-			identifier: property.notFound
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Access to an undefined property Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:\$fixedHeader_bool\.$#'
-			identifier: property.notFound
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Access to an undefined property Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:\$ordering_bool\.$#'
-			identifier: property.notFound
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Access to an undefined property Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:\$pageLength_int\.$#'
-			identifier: property.notFound
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Access to an undefined property Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:\$pagingType\.$#'
-			identifier: property.notFound
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Access to an undefined property Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:\$paging_bool\.$#'
-			identifier: property.notFound
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Access to an undefined property Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:\$responsive_bool\.$#'
-			identifier: property.notFound
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Access to an undefined property Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:\$scrollX\.$#'
-			identifier: property.notFound
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Access to an undefined property Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:\$title\.$#'
-			identifier: property.notFound
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Method Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:__construct\(\) has parameter \$data with no value type specified in iterable type array\.$#'
-			identifier: missingType.iterableValue
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Method Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:_renderAdvancedSettings\(\) has no return type specified\.$#'
-			identifier: missingType.return
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Method Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:_renderColumnSettings\(\) has no return type specified\.$#'
-			identifier: missingType.return
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Method Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:_renderFormatField\(\) has no return type specified\.$#'
-			identifier: missingType.return
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Method Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:_renderGeneralSettings\(\) has no return type specified\.$#'
-			identifier: missingType.return
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Method Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:_renderTableSettings\(\) has no return type specified\.$#'
-			identifier: missingType.return
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Method Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:_toHTML\(\) has no return type specified\.$#'
-			identifier: missingType.return
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Method Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:enqueue_assets\(\) has no return type specified\.$#'
-			identifier: missingType.return
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Method Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:enqueue_assets\(\) has parameter \$deps with no type specified\.$#'
-			identifier: missingType.parameter
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Method Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:hooks\(\) has no return type specified\.$#'
-			identifier: missingType.return
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Method Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:load_assets\(\) has no return type specified\.$#'
-			identifier: missingType.return
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Method Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:load_assets\(\) has parameter \$deps with no type specified\.$#'
-			identifier: missingType.parameter
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Method Visualizer_Render_Sidebar_Type_DataTable_DataTable\:\:load_assets\(\) has parameter \$is_frontend with no type specified\.$#'
-			identifier: missingType.parameter
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Parameter \#4 \$default of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
-			identifier: argument.type
-			count: 8
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Parameter \#4 \$desc of static method Visualizer_Render_Sidebar\:\:_renderTextItem\(\) expects string, null given\.$#'
-			identifier: argument.type
-			count: 4
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
-		-
-			message: '#^Parameter \#5 \$placeholder of static method Visualizer_Render_Sidebar\:\:_renderTextItem\(\) expects string, int given\.$#'
-			identifier: argument.type
-			count: 1
-			path: classes/Visualizer/Render/Sidebar/Type/DataTable/DataTable.php
-
 		-
 			message: '#^Access to an undefined property Visualizer_Render_Sidebar_Type_DataTable_Tabular\:\:\$__series\.$#'
 			identifier: property.notFound
@@ -4009,7 +3841,7 @@ parameters:
 			path: classes/Visualizer/Render/Sidebar/Type/DataTable/Tabular.php
 
 		-
-			message: '#^Parameter \#4 \$default of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
+			message: '#^Parameter \#4 \$default_color of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
 			identifier: argument.type
 			count: 8
 			path: classes/Visualizer/Render/Sidebar/Type/DataTable/Tabular.php
@@ -4063,7 +3895,7 @@ parameters:
 			path: classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Area.php
 
 		-
-			message: '#^Parameter \#4 \$default of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
+			message: '#^Parameter \#4 \$default_color of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
 			identifier: argument.type
 			count: 1
 			path: classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Area.php
@@ -4111,7 +3943,7 @@ parameters:
 			path: classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Bubble.php
 
 		-
-			message: '#^Parameter \#4 \$default of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
+			message: '#^Parameter \#4 \$default_color of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
 			identifier: argument.type
 			count: 1
 			path: classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Bubble.php
@@ -4159,7 +3991,7 @@ parameters:
 			path: classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Candlestick.php
 
 		-
-			message: '#^Parameter \#4 \$default of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
+			message: '#^Parameter \#4 \$default_color of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
 			identifier: argument.type
 			count: 5
 			path: classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Candlestick.php
@@ -4459,7 +4291,7 @@ parameters:
 			path: classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Geo.php
 
 		-
-			message: '#^Parameter \#4 \$default of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
+			message: '#^Parameter \#4 \$default_color of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
 			identifier: argument.type
 			count: 1
 			path: classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Geo.php
@@ -4573,7 +4405,7 @@ parameters:
 			path: classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Pie.php
 
 		-
-			message: '#^Parameter \#4 \$default of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
+			message: '#^Parameter \#4 \$default_color of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
 			identifier: argument.type
 			count: 1
 			path: classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Pie.php
@@ -4699,7 +4531,7 @@ parameters:
 			path: classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Tabular.php
 
 		-
-			message: '#^Parameter \#4 \$default of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
+			message: '#^Parameter \#4 \$default_color of static method Visualizer_Render_Sidebar\:\:_renderColorPickerItem\(\) expects string, null given\.$#'
 			identifier: argument.type
 			count: 14
 			path: classes/Visualizer/Render/Sidebar/Type/GoogleCharts/Tabular.php
@@ -5041,7 +4873,7 @@ parameters:
 			path: classes/Visualizer/Source/Json.php
 
 		-
-			message: '#^Method Visualizer_Source_Json\:\:getNextPage\(\) has parameter \$array with no type specified\.$#'
+			message: '#^Method Visualizer_Source_Json\:\:getNextPage\(\) has parameter \$data with no type specified\.$#'
 			identifier: missingType.parameter
 			count: 1
 			path: classes/Visualizer/Source/Json.php
@@ -5059,7 +4891,7 @@ parameters:
 			path: classes/Visualizer/Source/Json.php
 
 		-
-			message: '#^Method Visualizer_Source_Json\:\:getRootElements\(\) has parameter \$array with no type specified\.$#'
+			message: '#^Method Visualizer_Source_Json\:\:getRootElements\(\) has parameter \$data with no type specified\.$#'
 			identifier: missingType.parameter
 			count: 1
 			path: classes/Visualizer/Source/Json.php
@@ -5071,7 +4903,7 @@ parameters:
 			path: classes/Visualizer/Source/Json.php
 
 		-
-			message: '#^Method Visualizer_Source_Json\:\:getRootElements\(\) has parameter \$parent with no type specified\.$#'
+			message: '#^Method Visualizer_Source_Json\:\:getRootElements\(\) has parameter \$parent_key with no type specified\.$#'
 			identifier: missingType.parameter
 			count: 1
 			path: classes/Visualizer/Source/Json.php
diff --git a/phpstan.neon b/phpstan.neon
index d0545aa5c..971b4a6ce 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,5 +1,6 @@
 parameters:
 	level: 6
+	reportUnmatchedIgnoredErrors: false
 	paths:
 		- %currentWorkingDirectory%/index.php
 		- %currentWorkingDirectory%/classes
@@ -10,10 +11,6 @@ parameters:
 		- %currentWorkingDirectory%/vendor/neitanod/forceutf8
 		- %currentWorkingDirectory%/vendor/openspout/openspout
 		- %currentWorkingDirectory%/vendor/codeinwp/themeisle-sdk
-	ignoreErrors:
-		-
-			identifiers:
-				- requireOnce.fileNotFound
 includes:
 	- %currentWorkingDirectory%/vendor/szepeviktor/phpstan-wordpress/extension.neon
 	- %currentWorkingDirectory%/phpstan-baseline.neon
diff --git a/templates/support.php b/templates/support.php
index 31b570b00..07e8c043f 100644
--- a/templates/support.php
+++ b/templates/support.php
@@ -21,17 +21,17 @@ class="dashicons dashicons-cart"></span>More features</a>
 
 	<h2 class="nav-tab-wrapper">
 		<a href="<?php echo esc_url( admin_url( 'admin.php?page=viz-support&tab=help' ) ); ?>"
-		   class="nav-tab <?php echo $active_tab === 'help' ? 'nav-tab-active' : ''; ?>"><?php _e( 'Support', 'visualizer' ); ?></a>
+			class="nav-tab <?php echo $active_tab === 'help' ? 'nav-tab-active' : ''; ?>"><?php _e( 'Support', 'visualizer' ); ?></a>
 		<?php
 		if ( $show_more ) {
 			?>
 		<a href="<?php echo esc_url( admin_url( 'admin.php?page=viz-support&tab=more' ) ); ?>"
-	   class="nav-tab <?php echo $active_tab === 'more' ? 'nav-tab-active' : ''; ?>"><?php _e( 'More Features', 'visualizer' ); ?></a>
+		class="nav-tab <?php echo $active_tab === 'more' ? 'nav-tab-active' : ''; ?>"><?php _e( 'More Features', 'visualizer' ); ?></a>
 			<?php
 		}
 		?>
 		<a href="<?php echo esc_url( admin_url( 'admin.php?page=viz-support&tab=improve' ) ); ?>"
-		   class="nav-tab <?php echo $active_tab === 'improve' ? 'nav-tab-active' : ''; ?>"><?php _e( 'Help us improve!', 'visualizer' ); ?></a>
+			class="nav-tab <?php echo $active_tab === 'improve' ? 'nav-tab-active' : ''; ?>"><?php _e( 'Help us improve!', 'visualizer' ); ?></a>
 	</h2>
 
 	<div class="viz-features-content">
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index dd2ad1e19..230071c9a 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -5,6 +5,11 @@
  * @package Visualizer
  */
 $_tests_dir = getenv( 'WP_TESTS_DIR' );
+
+if ( class_exists( '\Yoast\PHPUnitPolyfills\Autoload' ) === false ) {
+	require_once dirname( dirname( __FILE__ ) ) . '/vendor/yoast/phpunit-polyfills/phpunitpolyfills-autoload.php';
+}
+
 if ( ! $_tests_dir ) {
 	$_tests_dir = '/tmp/wordpress-tests-lib';
 }
diff --git a/tests/test-ajax.php b/tests/test-ajax.php
index 11fb33962..1b197b603 100644
--- a/tests/test-ajax.php
+++ b/tests/test-ajax.php
@@ -84,8 +84,8 @@ public function test_ajax_response_get_query_data_valid_query() {
 
 		$response = json_decode( $this->_last_response );
 		$this->assertIsObject( $response );
-		$this->assertObjectHasAttribute( 'success', $response );
-		$this->assertObjectHasAttribute( 'data', $response );
+		$this->assertTrue( property_exists( $response, 'success' ) );
+		$this->assertTrue( property_exists( $response, 'data' ) );
 		$this->assertTrue( $response->success );
 	}
 
@@ -112,8 +112,8 @@ public function test_ajax_response_get_query_data_invalid_query() {
 
 		$response = json_decode( $this->_last_response );
 		$this->assertIsObject( $response );
-		$this->assertObjectHasAttribute( 'success', $response );
-		$this->assertObjectHasAttribute( 'data', $response );
+		$this->assertTrue( property_exists( $response, 'success' ) );
+		$this->assertTrue( property_exists( $response, 'data' ) );
 		$this->assertEquals( 'Only SELECT queries are allowed', $response->data->msg );
 		$this->assertFalse( $response->success );
 	}
@@ -141,8 +141,8 @@ public function test_ajax_response_get_query_data_valid_query_with_filtered_colu
 
 		$response = json_decode( $this->_last_response );
 		$this->assertIsObject( $response );
-		$this->assertObjectHasAttribute( 'success', $response );
-		$this->assertObjectHasAttribute( 'data', $response );
+		$this->assertTrue( property_exists( $response, 'success' ) );
+		$this->assertTrue( property_exists( $response, 'data' ) );
 		$this->assertFalse( $response->success );
 		$this->assertTrue( strpos( $response->data->msg, ".wp_insert' doesn't exist" ) !== false );
 	}
@@ -169,8 +169,8 @@ public function test_ajax_response_get_query_data_contributor_dissallow() {
 
 		$response = json_decode( $this->_last_response );
 		$this->assertIsObject( $response );
-		$this->assertObjectHasAttribute( 'success', $response );
-		$this->assertObjectHasAttribute( 'data', $response );
+		$this->assertTrue( property_exists( $response, 'success' ) );
+		$this->assertTrue( property_exists( $response, 'data' ) );
 		$this->assertEquals( 'Action not allowed for this user.', $response->data->msg );
 		$this->assertFalse( $response->success );
 	}
@@ -197,8 +197,8 @@ public function test_ajax_response_get_query_data_subcriber_dissallow() {
 
 		$response = json_decode( $this->_last_response );
 		$this->assertIsObject( $response );
-		$this->assertObjectHasAttribute( 'success', $response );
-		$this->assertObjectHasAttribute( 'data', $response );
+		$this->assertTrue( property_exists( $response, 'success' ) );
+		$this->assertTrue( property_exists( $response, 'data' ) );
 		$this->assertEquals( 'Action not allowed for this user.', $response->data->msg );
 		$this->assertFalse( $response->success );
 	}
@@ -226,8 +226,8 @@ public function test_ajax_response_get_query_data_invalid_query_subquery() {
 
 		$response = json_decode( $this->_last_response );
 		$this->assertIsObject( $response );
-		$this->assertObjectHasAttribute( 'success', $response );
-		$this->assertObjectHasAttribute( 'data', $response );
+		$this->assertTrue( property_exists( $response, 'success' ) );
+		$this->assertTrue( property_exists( $response, 'data' ) );
 		$this->assertEquals( 'Only SELECT queries are allowed', $response->data->msg );
 		$this->assertFalse( $response->success );
 	}
@@ -255,8 +255,8 @@ public function test_ajax_response_get_query_data_invalid_query_comment() {
 
 		$response = json_decode( $this->_last_response );
 		$this->assertIsObject( $response );
-		$this->assertObjectHasAttribute( 'success', $response );
-		$this->assertObjectHasAttribute( 'data', $response );
+		$this->assertTrue( property_exists( $response, 'success' ) );
+		$this->assertTrue( property_exists( $response, 'data' ) );
 		$this->assertEquals( 'Only SELECT queries are allowed', $response->data->msg );
 		$this->assertFalse( $response->success );
 	}
@@ -296,8 +296,8 @@ public function test_sql_save_chart_subscriber() {
 
 		$response = json_decode( $this->_last_response );
 		$this->assertIsObject( $response );
-		$this->assertObjectHasAttribute( 'success', $response );
-		$this->assertObjectHasAttribute( 'data', $response );
+		$this->assertTrue( property_exists( $response, 'success' ) );
+		$this->assertTrue( property_exists( $response, 'data' ) );
 		$this->assertEquals( 'Action not allowed for this user.', $response->data->msg );
 		$this->assertFalse( $response->success );
 	}
@@ -324,8 +324,8 @@ public function test_sql_save_chart_admin() {
 
 		$response = json_decode( $this->_last_response );
 		$this->assertIsObject( $response );
-		$this->assertObjectHasAttribute( 'success', $response );
-		$this->assertObjectHasAttribute( 'data', $response );
+		$this->assertTrue( property_exists( $response, 'success' ) );
+		$this->assertTrue( property_exists( $response, 'data' ) );
 		$this->assertEquals( 'Feature is not available.', $response->data->msg );
 		$this->assertFalse( $response->success );
 	}
diff --git a/tests/test-export.php b/tests/test-export.php
index 3452ebab6..7f47aeb60 100644
--- a/tests/test-export.php
+++ b/tests/test-export.php
@@ -58,35 +58,109 @@ private function create_chart() {
 		$this->chart    = $query->posts[0];
 	}
 
+	/**
+	 * Runs the export AJAX action and returns the decoded response.
+	 *
+	 * @since 3.11.0
+	 *
+	 * @access private
+	 * @return object|null
+	 */
+	private function run_export() {
+		$_GET = array(
+			'security' => wp_create_nonce( Visualizer_Plugin::ACTION_EXPORT_DATA . Visualizer_Plugin::VERSION ),
+			'chart'    => $this->chart,
+		);
+
+		ob_start();
+		try {
+			$this->_handleAjax( 'visualizer-export-data' );
+		} catch ( WPAjaxDieContinueException $e ) {
+			// We expected this, do nothing.
+		} catch ( WPAjaxDieStopException $ee ) {
+			// We expected this, do nothing.
+		}
+		ob_end_clean();
+
+		return json_decode( $this->_last_response );
+	}
+
 	/**
 	 * Testing export
 	 *
+	 * @since 2.0.0
+	 *
 	 * @access public
 	 */
 	public function test_download_export() {
 		$this->create_chart();
 		$this->_setRole( 'administrator' );
 
-		$_GET  = array(
-			'security'      => wp_create_nonce( Visualizer_Plugin::ACTION_EXPORT_DATA . Visualizer_Plugin::VERSION ),
-			'chart'         => $this->chart,
+		$response = $this->run_export();
+		$this->assertIsObject( $response );
+		$this->assertTrue( property_exists( $response, 'success' ) );
+		$this->assertTrue( property_exists( $response, 'data' ) );
+		$this->assertTrue( $response->success );
+	}
+
+	/**
+	 * CSV response contains the expected keys from _getCSV.
+	 *
+	 * @since 3.11.0
+	 *
+	 * @access public
+	 */
+	public function test_csv_export_response_structure() {
+		$this->create_chart();
+		$this->_setRole( 'administrator' );
+
+		$response = $this->run_export();
+		$this->assertIsObject( $response );
+		$this->assertTrue( property_exists( $response, 'success' ) );
+		$this->assertTrue( property_exists( $response, 'data' ) );
+		$this->assertTrue( $response->success );
+
+		$data = $response->data;
+		$this->assertTrue( property_exists( $data, 'csv' ) );
+		$this->assertTrue( property_exists( $data, 'name' ) );
+		$this->assertTrue( property_exists( $data, 'string' ) );
+		$this->assertIsString( $data->csv );
+		$this->assertIsString( $data->name );
+		$this->assertIsString( $data->string );
+		// filename must end with .csv
+		$this->assertStringEndsWith( '.csv', $data->name );
+		// string is csv without the BOM
+		$bom = chr( 0xEF ) . chr( 0xBB ) . chr( 0xBF );
+		$this->assertStringNotContainsString( $bom, $data->string );
+	}
+
+	/**
+	 * Export must fail gracefully for non-existent chart ids.
+	 *
+	 * @since 3.11.0
+	 *
+	 * @access public
+	 */
+	public function test_csv_export_invalid_chart_returns_no_success() {
+		$this->_setRole( 'administrator' );
+
+		$_GET = array(
+			'security' => wp_create_nonce( Visualizer_Plugin::ACTION_EXPORT_DATA . Visualizer_Plugin::VERSION ),
+			'chart'    => PHP_INT_MAX,
 		);
 
-		// swallow the output
 		ob_start();
 		try {
 			$this->_handleAjax( 'visualizer-export-data' );
-		} catch ( WPAjaxDieContinueException  $e ) {
+		} catch ( WPAjaxDieContinueException $e ) {
 			// We expected this, do nothing.
 		} catch ( WPAjaxDieStopException $ee ) {
 			// We expected this, do nothing.
 		}
 		ob_end_clean();
 
+		// No success JSON should have been emitted for a missing chart.
 		$response = json_decode( $this->_last_response );
-		$this->assertIsObject( $response );
-		$this->assertObjectHasAttribute( 'success', $response );
-		$this->assertObjectHasAttribute( 'data', $response );
-		$this->assertTrue( $response->success );
+		$this->assertTrue( empty( $response ) || empty( $response->success ) );
 	}
 }