Null reference exception

Hello,

Recently when I updated to 2020.3.27f1 I keep getting random errors and I have to restart editor to work again.
This is the error:https://gyazo.com/0a2d72c16e002bb5f7194f7b1c77d135

 

Some things to try:

- reimport all
- clear package cache
- remove any and all unwanted package

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 @Kurt-Dekker, I will try that.