Blank screen while screen sharing on tablet

I have a Samsung Galaxy Tablet S6 Lite and Zoom version 5.16.10. My screen sharing was working perfectly last week, but when I shared my screen yesterday, it looked normal from my end, but my meeting partner said they only saw a black screen. This has continued. I assume there was an update which messed it up. I tried following the guidelines here, but I'm using a tablet, not a desktop. I don't see an option on my tablet for pulling up a control panel at all; I can't find nvidia or an app that seems to do what they want on my tablet; I can't see options in my tablet's settings to input the graphic that the link recommends.

Any help is appreciated. Thank you!