Page not found (404)

Request Method: GET
Request URL: https://ummash.ru/article/27+%D0%BE%D0%BA%D1%82%D1%8F%D0%B1%D1%80%D1%8F
Raised by: apps.domains.views.RouterView

You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.