Unable to delete, shut down or export photo's.

I am having a LOT of trouble with the cloud based LR program.  It runs correctly about 90% of the time but the other 10% it drives me crazy.  Today it began acting up again. After I downloaded pic's from my HD I began reviewing them to cull the bad shots.  What happens is after I select a group, from 1 up to say 20 or 30 and hit delete they are removed. But THAT'S it. I can't delete any more pic's. I can process pic's, crop, etc., but I am unable to export them and when I try to delete any more pic's they stay in my task bar, heavily greyed out.   I can't even shut the program unless I utilize the Task Manager. I've tried uninstalling several times and nothing helps.  I'm running a Win11, 3tb SSD, i7 intel chip, high end graphics card and 32gb of memory. Version 6.4 of LR.  I have been running this set up for 2 years now without trouble. WHAT IS THE SOLUTION? THanks

Mike