Can't See/hear other players

Entering the game we can all see the map and hear the jukebox but we can't see or hear each other. Exiting the game and re-launching sometimes leads to some players being able to see and hear each other, but most often times leads to less players able to hear or see each other. Reconnecting with the reconnect button can sometimes help to connect to another player or two, but not once have we all been able to see and hear each other all at the same time.

Our group has been having the same problem.  Changing browsers didn't seem to help, reloading sometimes improves, but we could never have more than 5/6 people communicating. 

The sound/video system used by roll20 relies on good bandwidth by all players, and the more players you have the more bandwidth each individual person needs.  (Your computer sends the video and audio separately to each player.) You could with audio only and see if that works. If it does, but audio+video doesn't work, then bandwidth is most likely your problem.