I just spent the day building maps for an upcoming one off, and I had one of my players join so I could test to see if everything works, but when they join the game they just get a blank white board and when I join the game as a player I get the same thing. Everything is there when I'm a GM, I've followed map building tutorials step for step and I don't know what I'm doing wrong. Any help would be greatly appreciated, this is the second time I've had to redo these maps and I don't want to lose an entire days worth of effort.