Hi, I have the same problem--I can only see me and not anyone else in the room (and they have the same issue where they can only see themselves and not me). I went to https://test.webrtc.org/ and it said the following problem exists:
[ INFO ] Gathered candidate of Type: srflx Protocol: udp Address: 188.8.131.52
[ WARN ] Could not connect using reflexive candidates, likely due to the network environment/configuration.
Is this the issue? If so, how do I fix it? Thanks!!!