Pinnacle of Its Kind not completing

I also have a problem with this quest. I killed all 3 demons (yes, the quest is now updated to go back to the sealed door) but the door is closed. When I approach it, Rook doesn't say the wisps are needed to unlock it, nothing. There are 4 wisps clustered floating around chests next to the merchant, but not sure whether they are there by design or are they the ones for the door misplaced somehow. They don't follow me at all