So here's my issue. I tried to buy AHD and the other new expansion pack, because i thought i might as well get it. But it wouldn't let because my base game wasn't through steam. So me with my very limited knowledge went and bought the base game through steam so i could have the expansions. When i start the game it, it goes well but part way through the loading screen when it gets to map logic part of loading it just stops and these error messages come up: