Visiting the `/400` url of example_projects results in a server error
I'm getting a TypeError upon visiting the URL directly.
File "/home/sim/dev/mailman/postorius/example_project/env/lib/python3.6/site-packages/Django-1.11.10-py3.6.egg/django/core/handlers/exception.py" in inner
41. response = get_response(request)
File "/home/sim/dev/mailman/postorius/example_project/env/lib/python3.6/site-packages/Django-1.11.10-py3.6.egg/django/core/handlers/base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "/home/sim/dev/mailman/postorius/example_project/env/lib/python3.6/site-packages/Django-1.11.10-py3.6.egg/django/core/handlers/base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/sim/dev/mailman/postorius/example_project/env/lib/python3.6/site-packages/Django-1.11.10-py3.6.egg/django/utils/decorators.py" in _wrapped_view
149. response = view_func(request, *args, **kwargs)
Exception Type: TypeError at /400/
Exception Value: page_not_found() missing 1 required positional argument: 'exception'
@maxking what is this for? How is it supposed to work?