The Stronghold is completed but shows failure

When will this damn bug be fixed, and still block my legendary merchant, is the program written with your feet?

yeah, same here

This is a problem specific to the Iron Citadel. What's happening here is that the game doesn't think you killed Geonor, because Sin doesn't show up to finish him off. He just lays there on the ground, not dying (even though he still drops his loot and you get quest completion credit).