Blank Pages pop up and will not close unless in shutdown.
This happened in January and was a quick fix...just cannot remember. In Mail: I open it and immediately a blank unusable page pop up. It will not close and Force Quit does not work and several complete shut downs do not work.
The fix was like 'one click' on an option...(one I did not do). Not a virus, or the drive, all is updated, nothing is dirty, etc. Please advise
Mac mini, 15.0