After casting Spirit Sight (cast outside the area while looking for ghosts and cast again inside the area to try and remedy the problem) to see the levers that should move the stone coffin out of the way, the levers do not move when used.

I have a companion standing on the switch behind the door and it does cause effects inside the room (blood, fire, etc) but the levers do not animate and when pressed in the correct order they do not create holy fire and trigger the coffin to move.