I've seen a few bug reports with people building stuff but how do you even get to this stage? Clicking on it gives you a "change dungeon" button, when you accept nothing happens because no dungeon is selected. Enter dungeon is greyed out. Enter Sample dungeon closes the menu but doesn't go anywhere. Looked on all the NPC vendors that are available on pots and found no item that could be used like a house / basement. Can we at least have a little clue?