I placed the classic Villa home and wanted to put a south facing stone oven in the NW corner on the first floor. It keeps getting blocked and I am getting the message "The targeted location has at least one impassible tile adjacent to the structure. Construction aborted. Please try again." I have no such trouble placing with the Hearth of the Home Fire in the same place, so I don't understand why I can't place the oven where the Hearth easily fits. Any tips on what I can do?