I'm a new DM here and still getting used to roll20, so I'm not sure if I've done something dumb or if there was some bug. I made a new game and built a world map from scratch. Logging in and out, the map was consistently there. Now that I've created a couple new local maps I went back to the world map and the adjusted grid I created the map on was there, but the grid was entirely empty. Is there something that I could have done, or one of my players could have done to accidentally removed all of the "Maps and backgrounds" layers from that page? I just want to get this sorted out before I try to remake something and have it disappear again because of something I don't understand.
