When i collected all 4 Aetherium Shards and went to the Ruins of Bthalft Katria didn't appear.
I placed the shards in the mechanism anyway but, as i already told, Katria did not appear and there was no earthquake. After the quest updated to "stand clear" i went to the questmarker and nothing happened.
I tried fast traveling back and forth, and when i fast traveled back, the tower did arise after all and Katria appeared but this time the elevator and the lever wont appear so i cant enter the forge.
I tried google to solve the problem but it seems im maybe the first.
Can anybody help me?