Found a quest hut I could not enter.
I tried to move on top of it, then I noticed it "bugged out" (happens once in a while), so I checked my hero was in the 1st slot in the 2man group, and retried, no success.
So I save up the game, exits Fallen Enchantress completely, fires it back up and tries to re-enter the hut, but no success.
I can tell you my difficulty is on expert, its a medium map size and I have 4 opponents, the rest of the map settings are pretty vague.. since they were random (Yes all of them, including pace ).
Here is the save I loaded, just click nr 2 hero, the one with 3 movement, and "re-enter" the hut (Walk to the nearby swamp or plains, then walk back to the quest square).