You might be on to something here. When I tried to set up a call with myself just now, the issue occurred, but when I switched to mobile hotspot, I could connect. It could be that the co-working I am usually in blocks this, and I didn't realise this pattern, so I assumed this was an irregular failure.
I'll test this again later, just to be sure, but you might have solved the mystery, thanks a bunch!
@james said in Mirotalk - Participants can't see each other 2:
Also, did you set SFU_SERVER=true in your /app/data/env file as suggested by @mirotalk?
Yes!