I set up a test meeting. Go through accept camera and mic etc. At this point I can see the display of the camera in the screen. Click ok. The screen disappears and the zoom control window appears - small oblong window with four large square icons. There is no way to reopen the window so I cannot join the meeting.
Using Ubuntu MATE 20.04 on HP Elitebook 840 G1
Not sure if I should post here or on community so doing both. The chat bot has no idea what I am talking about!