Thanks for looking into this, although I suppose the best course of action would be, in the end, to just make a new game after this one with clean game, you know, with uninstalling the game and and all mods and whatnot. Heinous task, but oh well, you gotta pay the price for modding too much I suppos...

Yeah, I have this very issue as well. Tried couple of things and the only solution that has worked so far is to finish the quest by cheats. But this leaves me with one achievement which I cannot complete, which bugs me a lot. I really wanna 100% this game. Mods: 11 (+ENB), disabled them all and issu...