I had that and for my playthrough it was because I'd forgotten to find where one of the people in that room went next for 11 and hadn't realised it. Hope you work it out
Edit: it was in 12 instead
Hi!
Can you triple check for me scene 12? I've seen someone else also get stuck in this position, and that was the one they were missing. (You should have two scenes for 12.)
Honestly, kind of a flaw in the game that it's so easy to miss that and get stuck. It's hard to reference anywhere else though...
(Obviously if this still turns out to be a bug, let me know!)