Boots to black screen, can't see anything or do anything

AdamS36

Bit poster
I have been running my Parallels desktop on a Mac and it had worked for over a year. All of a sudden it only boots to a black screen and I can't do anything. When I initiate the application to goes to the Suspended screen. I play the Play button, and it goes up to 100% but then leaves me on a black screen. Any keyboard or mouse clicks make a beep and do nothing. Advice appreciated!
 
I have the same issue, Catalina update to 10.15.7 (19H1217) and Parallels Version 16.5.0 (49183). Black screen of misery.
Please help TIA
 
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