I'm playing a quest mod called Windfall and after 40 hrs. of working fine I started getting the message "The door is locked" everytime I go through a door. The doors aren't locked, I go right through, and then I get the message and it stays on the screen for about a minute. I don't really know if it's related to the mod or not but it was in a dungeon on the island of Windfall where it started.

Are there any tricks to get rid of this stuck message?