Help! Screen sharing renders a grey view rather than my selected monitor

[JeffGarner]

Hey there! I have an issue where the screen sharing output results in a grey screen for all audience members. Can anybody help me fix this?

Actual (from recording, though is identical experience to occupants in Zoom meeting): 

Expected:

[mtapscott]

Did you ever find a solution for this? I'm having the same problem and am unable to find a fix.