Attendees can't see me

When I enter someone else's Zoom room my camera is turned off so people can only see my picture. This only happens on Mac, not my iPad or mobile device. When I start a Zoom meeting there is no problem.

I have asked Chat GPT for all options to remedy this. Camera/permissions are fine. I have downloaded new app for second time. Chat GPT has suggested using email invite in another browser. 

Has anyone else had this problem?