I’m also appearing to be having issues with loading up my display and not having the 3D world appear. I’ve had this issue a few times but normally closing FWsim and reopening works but this time it just doesn’t seem to load.
I have the same issue. I have multiple projects and none of them are loading the 3D world. It loads up a bit slower than usual and then a pop-up. It was working just fine yesterday, and when I tried to open it up today, nothing. The show itself loads fine, just not the scenery - all I get is floating positions, a sky, and an ocean.