Everyone else can see eachother, and everyone can see me, but I can't see anyone except myself.

Everyone can be heard, including me.

Please advise on how to fix.  It's extremely uncomfortable to participate in meetings this way (no ability to read body language, facial expressions, etc.)

This has occurred with meetings originating from multiple different clients.

At one point the issue suddenly seemed resolved, then it started again.

Zoom staff will not provide support.

I am using Opera as my browser on a Windows machine.