I then went to GO -> Utilities -> Terminal in order to overwrite the Gatekeeper I was now able to log into the app, but it still gave an error accessing the files: I renamed the folder DriveFS to DriveFS.old I went to the Finder folder Library -> Application Support -> Google.
I reinstalled the app (still gave an error when trying to log in) I deleted the Google Drive File Stream app, emptied the trash Solved it! It was a combination of many solutions presented above, but I just had to put them in the right order:
