Can anyone help with this one? My friends and I made it through the Craglorn delve Tombs of the Na-Totambu (not the lost city, but just the Tombs), which was actually pretty easy. But after we killed the end boss and headed into the tunnel towards the skyshard, we encountered a door that none of us could open (we saw the name of the door but the keystroke to open the door was just greyed out). Has anyone been able to open that door?