In build custom building mode, I placed a roof on the building then removed it by using the green undo button. Then when I clicked the N W S E buttons to change the direction the roof was facing for when I replaced it and when I tried to put the roof back on it didn’t work and I got a couple of error messages.
The first error was: stonehearth/services/server/build/build_service/luac:318:attempt to call method ‘get_component’(a nil value)
Then lua runtime error.
Hope this helps you fix it