Unity 2019.4 does not build because it does not have the UIElements.HelpBox class

[ScarlettHoefler]

I've attempted to upgrade an old project to the latest version of Steamworks.NET (at the time of writing, that's 2025.162.1). The project is running in Unity 2019.4.41f2 (the latest 2019.4 release).

After importing the updated project, I get this error message:

Library/PackageCache/com.rlabrecque.steamworks.net@af710043b9/Editor/Settings/EditorSteamworksNETSettingsElement.cs(72,27): error CS0246: The type or namespace name 'HelpBox' could not be found (are you missing a using directive or an assembly reference?)

According to the release page, 2019.4 is implied to work:

Unity version notice: As of Release 20.0.0 the minimum supported Unity Version is the LTS release "2019.4" due to the package support!

However, looking at the Unity docs for UnityEngine.UIElements.HelpBox, it looks like the oldest supported version for that is 2020.1, or at least that's the oldest version that has a doc page for it.

[nuninhoneto]

Same here with Unity 2019.4.41f2

[rlabrecque]

Sorry about that, yeah 2019.4 is easy enough to continue to support. Hopefully that fixes it up?

[nuninhoneto]

Yes, I can confirm that this solves the problem. Thank you!

But on line 9 of the same file, I'm afraid it doesn't work when the user installs SteamWorks.NET from the Unity package.

private const string UssFilePath =
        "Packages/com.rlabrecque.steamworks.net/Editor/Settings/EditorSteamworksNETSettingsStyleSheet.uss";

Change "Packages" to "Assets" allows access to the Steamworks configuration screen in the project settings window. Otherwise it raise FileNotFoundException.

[rlabrecque]

Should be solved with #766! Closing this out for now but please re-open if you're still seeing issues.