I tried to add my own preform, but I reported this error
Traceback (most recent call last):
File "crash_log.py", line 19, in handle_crash_log
File "gui_generation.py", line 27, in generate
File "ntime.py", line 11, in ntime
File "world.py", line 1301, in run
File "world.py", line 265, in generate
File "world.py", line 542, in init_cities
File "world.py", line 642, in gen_cities
File "hub_factory.py", line 25, in gen_random_city
File "hub_factory.py", line 59, in gen_random_hub
File "city.py", line 46, in __init__
File "city.py", line 61, in generate
File "city.py", line 274, in populate_grid
File "city.py", line 246, in try_place
AttributeError: 'NoneType' object has no attribute 'rotate_to_face'