Feral Heart

I recently downloaded the legendary markings and items to go with this game. Everything was fine until I had problems going into "The Grounds" map. And sometimes when I go into other maps that was installed with the game, it says "FeralHeart.exe has stopped working." And I have to wait for 30 minutes or an hour for me to go to the other maps again. But I completely do not have access to the map "The Grounds" map on Feral Heart. Any help please?