Yeah, it's kind of obvious that a boss fight should start but nothing happens. I've tried it a couple of times, got fish form meanwhile too (useless in this case of course :-D ). I get into the room with the warrior, chat with him or not, as soon as I approach the god's statue the door in the back is closed and I am stuck, that's it. It might be of interest for you that I can move in the room, but the camera doesn't follow my character anymore to the right side of the room, it's focused on the statue.
However, as far as I got I really love the Mod. I can hopefully play on some day (i.e. after you have had time to fix the bug).