Oh wow, such a fast reply. Thanks! Gonna try that now.
I wasn't saying what happened with Saul was a bug, I just thought that maybe this is the cause of my other bug, since I freed him before I took the chalice

Edit: Yeah, I sent the Drudanae (I think it was called like that) to the tower and took it back and now I opened the hatch and everything is fine

Thanks again!