An internal error has occurred

OK, I'm stuck with that "Internal Error Has Occurred" Message.  It's been days I'm trying all the solutions in the threads: AppData Local  solution, removing and reinstalling everything with the ACROCLeaner.  I'm so pissed. I'm paying a monthly fee and cannot use Acrobat Pro at all.  It jams with a black blank screen as soon as it opens.  Please help.

Running under Windows 11 (same was happening beofre I just upgraded from Win 10).