screen sharing where participants see it fine but it turns black for me

[cad2]

Latest version 6.6.11. Both online and using app when I screenshare, participants can see my screen just fine but my screen turns black. I feel like I've tried everything to fix it.  Works with other programs similar to Zoom. 

Tried

Updating app

Clearing cache

Updating drivers

Restarting

Multiple browsers

[cad2]

When I share my screen in a meeting, the participants can see it just fine BUT my screen goes black.   Works fine in other applications like Teams.