Template not loading from Unity 2020.1 on

[jyearley]

After uploading a SCORM package.zip to an LMS (for example SCORM Cloud), then launching the Web app, it only shows the WebGL logo, and "%UNITY_WEB_NAME%" at the top.
Launches fine up to Unity 2019 4.18f1 (LTS). Though it appears to not load from Unity 2020.1 on.

Did some testing and noticed console errors in the Web browsers when this occurs ("Uncaught ReferenceError: UnityLoader is not defined"). Top image showing this in FireFox, and bottom is in Chrome:

Looked into it a bit, and this may partly be related to Unity and changes made with WebGL starting with 2020.1:
There was an official Unity announcement in the Unity forum with the post titled: "Changes to the WebGL loader and templates introduced in Unity 2020.1"

[guru-1234]

I'm also having that issue now, im complete beginner on this. don't know what to do after this point.