MacBook App Store not downloading or updating apps When I want to download an app (clicking on the cloud with arrow icon) or when I want to update an app (like XCode), the app gets the &quot;square in circle&quot; icon and stays like this forever.

clicking on the square does not stop/cancel the process
signing out and back in the App Store or restarting the MacBook (Big Sur) did not help (i.e. the same behaviour when signing back in or after restart.
there is Internet (since I see and choose App Store content)

Is there a command line (in the terminal) to force cancel a started download / update?
Is there a place (log file or already installed logging app) to see the errors why App Store is stuck?
A common solution is retry the operation in Safe mode.