Question PackageCache test - ugui massive error

Hello everyone, I have to use the project from a class mate on my computer, and when I try to open the project I just get this type of error, I've been trying to delete the folders (test and ugui from PackageCache), to delete the lines of dependencies as the solution posted here: https://forum.unity.com/threads/temp-unityengine-testrunner-dll-error.1133938/#post-7287748
But the folder always comes back and regenerates so I can't make it to work.
Even the project doesn't open correctly so I must enter on safe mode, does someone knows what else can I do?

I'm using unity 2020.3.15f2 that is the same version the project is running on my mate computer.

 

That is how the package manager works.

You must use the manager to REMOVE problematic packages, or else edit the Packages/manifest.json yourself.

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