Bug Could not resolve type with token 01000149 error is annoying

TypeLoadException: Could not resolve type with token 01000149 (from typeref, class/assembly UnityEditor.SceneManagement.PrefabStage, UnityEditor, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null)

So the story here is I was fixing some package conflicts, all of it is solved now, but I removed an asset and started resolving some script assemblies, it took a lot of time 30mins, I search the internet why is it that, said its a bug at my version (2020.3.37f1)

In the picture it keeps spamming me that error, and you can see it +999 which was stuffing my ram and making me lag.

Has anyone been through this? I had 4 version switches now and this still follows me, at this point, it'll follow me to my grave.

 

Bump

 

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

 

Thank you! but I actually fixed it by just resetting the package manager to default settings

 

About resetting you mean "Reset packages to defaults" button ?