Maybe I shouldn't always say it this way, but it looks like the normal error that you always get in these games.
At some point it was suddenly gone, I made two saves and loaded the older one accidently, suddenly I was able to play it normally, maybe you should not skip around that part of the game. I did because I wanted to read new texts only when I prepared my save.
Not sure if I can provoke that again since it was gone it just moved around the building in some kind of loop when I clicked ignore when it happened.
If you want I try to provoke it again and find something to post here.