I also have this issue. On Xbox, took the attack conversation tree, died, respawned with my companions in the locked room without Ygwulf or the other NPCs. Can't fast-travel out, can't unlock the doors. My most recent save was 4 hours prior, so I'd prefer to salvage this run if possible. I've tried a manual save and reload to see if that might cause the NPCs to spawn but it does not. Some response to this 6 day old thread would be appreciated.