Hmm, that is odd. Are you talking about the first horizontal hallway? All the players who want to join must stand on the carpet to join the game before one of them leaves through the door on the right.
we got past the first room but it didn't let us get past the next room that shows the picture on the side.
Hmm, interesting. What operating system are you playing on? How many players are you?
Using Windows 10 and playing with 2 players
I haven't been able to reproduce the issue now but I'll look into it a bit later.