My friends and I have had a session before and things worked fine. However, we tried to have a session today and when we started up the campaign it there was a blank screen with our player tokens, but the maps would not load. The DM could see the maps when they were put in, but the rest of the party could not. The players could draw on the screen but the DM could not see it and when the DM tried to move the player tokens, they would not update for the players.