Bug ERROR: Library/PackageCache/com.unity.test-framework@1.1.31/UnityEditor.TestRunner

Library/PackageCache/com.unity.test-framework@1.1.31/UnityEditor.TestRunner/TestRunner/Utils/EditorLoadedTestAssemblyProvider.cs(17,26): error CS0246: The type or namespace name 'IEditorAssembliesProxy' could not be found (are you missing a using directive or an assembly reference?)

 

Extra unwanted packages in new projects (collab, testing, rider and other junk):

https://forum.unity.com/threads/temp-unityengine-testrunner-dll-error.1133938/#post-7287748

About the fastest way I have found to make a project and avoid all this noise is to create the project, then as soon as you see the files appear, FORCE-STOP (hard-kill) Unity (with the Activity Manager or Task Manager), then go hand-edit the Packages/manifest.json file as outlined in the above post, then reopen Unity.

Sometimes the package system gets borked from all this unnecessary churn and requires the package cache to be cleared:

https://stackoverflow.com/questions/53145919/unity3d-package-cache-errors/69779122

 

thanks, but it didn't solve the problem =(

 

the solution was, create a new project, and copy all the assets

 

How Do I Copy Assets? (Im New To Unity)