error on build client first step

[tlightsky]

Error:
Uncaught Error: No protocol method ICollection.-conj defined for type cljs.core.async.impl.channels/ManyToManyChannel: [object Object]

Code below is in websocket.cljs

(ns async-workshop.chat-demo.client.web-socket
  (:require [goog.events :as ev]
            [om.core :as om :include-macros true]
            [cljs.core.async :as async :refer [<! chan >! put!]]            
            [om.dom :as dom :include-macros true])
  (:require-macros [cljs.core.async.macros :refer [go-loop]])
  (:import goog.net.WebSocket))
(def socket-chan (chan))

(defn ^:private make-init-state
  []
  (let [socket (WebSocket.)]
    (ev/listen socket
               #js [WebSocket.EventType.CLOSED
                    WebSocket.EventType.ERROR
                    WebSocket.EventType.MESSAGE
                    WebSocket.EventType.OPENED]
               (fn [e]
                 (.log js/console (.-type e))
                 (put! socket-chan (.-type e))
                 ))
    {:socket socket}))

(defn ^:private socket-state-loop [global-state]
  (go-loop []
    (when-let [msg (<! socket-chan)]
      (.log js/console msg)
      (recur))))