Page not found (404)

Request Method: GET
Request URL: http://school4pv.ru/material/uchebnyij-plan-maou-sosh--4-na-2018-2019-uchebnyij-god/
Raised by: freycms.views.material_by_slug

No Material matches the given 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.