Hello my DK is stuck, not stuck like character stuck, but I completed some quests, and then I dont have anymore quests to do here in Plagueland, I have watched some guides and Prince Valanar suposed to give me another quest to continue, but he doesn't, when I try to leave the area by foot It seem to be like a invisible barrier I cant cross, so I have no quests, and I can't leave, what can I do?