Page not found (404)

Request Method: GET
Request URL: https://ummash.ru/article/%D0%98%D1%89%D0%B5%D1%82%D0%B5+%D0%B1%D1%8E%D1%81%D1%82%D0%B3%D0%B0%D0%BB%D1%8C%D1%82%D0%B5%D1%80+%D0%BF%D0%BE%D0%B4+%D0%BF%D0%BB%D0%B0%D1%82%D1%8C%D0%B5%3F
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.