'Specifying a namespace in include() without providing an app_name '

[Django1x -> 2x]解決: 「’Specifying a namespace in include() without providing an app_name ‘」

[Django1x -> 2x]解決: 「'Specifying a namespace in include() without providing an app_name '」

python manage.py runserver
やると

'Specifying a namespace in include() without providing an app_name '
'Specifying a namespace in include() without providing an app_name '

'Specifying a namespace in include() without providing an app_name '
django.core.exceptions.ImproperlyConfigured: Specifying a namespace in include() without providing an app_name is not supported. Set
the app_name attribute in the included module, or pass a 2-tuple containing the list of patterns and app_name instead.

エラーが治った。'Specifying a namespace in include() without providing an app_name '
エラーが治った。'Specifying a namespace in include() without providing an app_name '