It did open, but not to the White Room. The door would not allow those without the Stone Tablet to enter. It revealed to them, instead, something.. Else. It showed them the Black Room.
The room looked just like the White Room had when Lucien had first entered it. There was no technology inside. The only difference between the two rooms would appear, at first, to be that this room had black walls, a black ceiling, and a black floor.
Something else was inside it, though.. Or someone.
It was a Narrikian, stuck inside.. The moment the door opened for them, they vanished... This Narrikian had just been freed.