What do you mean after starting the dungeon? Did it crash?
After the scene/dialog at start. After or while the level loading the game closed/crashed. Saw the level for short less then 1 sec. maybe 1/4sec:?
Have tried it to download it again, start it on desktop, in the .zip and as admin. still crashed (without an error-field or something like that).
I tried it today again, still crashed. Saw it too you have a test version? I tried that too, but it crashed too.
Web version worked but... ^^'