I tried clicking on Window->Packagemanager and then some update button, now this pops up and i have to enter in safe mode. Please help
Was there an actual reason to update? Did you read the requirements first? You might need to update other stuff too. Packages rarely live in a complete vacuum.
You might get success by rolling back to the previous version you were using, or else removing it and re-adding it afresh, which may trigger the correct dependencies.
Extra unwanted packages in new projects (collab, testing, rider and other junk):
https://discussions.unity.com/t/846703/2
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