Anyone know a fix for this? I completed all of the underdark quests but am unable to either proceed to Act 2 or the Mountain Pass. It just asks if I finished what I had to do in Act 1 and no matter how I answer, it doesn't respond and I'm stuck in Act 1.
You can check what the mod manager says, it knows which mods you had installed when you started that particular game, and what's installed now. If it flags anything missing, re-enable, and vice versa.