I died on the first try of the Ygwulf fight. When I respawned and came back into the room he's not there, and I'm locked in the room. There are two doors to exit that both require Ygwulf's key. No other way out. I tried to fast travel out of the room, it says "you can't fast travel right now". I'm not in combat, the quest marker for where Ygwulf is supposed to be is right in the middle of the room, just no Ygwulf and I can't go anywhere, so pretty much I can't play the game anymore.