Page not found (404)

Request Method: GET
Request URL: http://www.gatsuurt.mn/%D0%BC%D1%83%D0%B6%D0%B0%D0%B0%D0%BD2019/

Шүүлтүүрт таарах slug олдсонгүй

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.