Completely remove the doors from the house from map editor. Add new doors, then use house tile on whole house including doors.
You can try using different doors, see what the results are then, or make sure the house entry in database isn't messed up, if so just remove the line with that house while server is offline and start it up again.
Just have to tinker sometimes, if the door doesn't show it's a house and say nobody owns it, then it means it's still messed up,try making sure there is a house entry set, that doesn't usual matter but maybe if house entry is set in wrong spot like on door instead of in front of door, it isn't letting you set door properly.
Also, according to that screen shot there is no items in house, worst case delete the house in house palette in the map editor, if none of those things work, then make a new house in house palette.