Stuck @Tenebrous Depths, Doors won't open

I’m @ lvl 11, stuck in this dungeon. I’ve beat all the enemies and my journal says the next floor is open. I’m trying to get through the wall and the room on the upper righthand of the map, but neither will open. I can see that there’s a room in the map, but I can’t get to it. Help pls.

There is a lot of fake rooms that appear from time to time.

floor 11 full map