Page not found (404)

Request Method: GET
Request URL: http://jet-english.mn/index/index/news/%D1%85%D3%A9%D0%BD%D0%B3%D3%A9%D0%BB%D3%A9%D0%BB%D1%82/

No slug found matching the query

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.