Page not found (404)

Request Method: GET
Request URL: http://localhost/kak-mne-poluchit-zadolzhennost-po-zarplate-za-maj-iyun-iyul-avgust-sentyabr-i-raschetnye/
Raised by: django.contrib.flatpages.views.flatpage

No FlatPage 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.