Hi everyone hope you can help
Once I enter Dvergr hall through the main door, I can’t go back out.
Also I can’t go into the secret passage from the forge area
Is this a bug?
Help!!

I am not sure why you can't go back out. Even if doors become closed, you can always portal out.

What concerns secret passage: it only opens after you complete quest which you get in forge room (the quest to kill king of mushrooms in the nearby cave, which can be reached from the other exit from Dvergr Halls, but if that exit is blocked, perhaps you need to kill mini-boss for that, he is found a bit to the north from forge room)..