Page not found (404)

Request Method: GET
Request URL: http://xn----ctbjmjcrfri8d8c.xn--p1ai/%25D0%25BD%25D0%25B0%25D1%2588%25D0%25B8-%25D0%25BD%25D0%25BE%25D0%25B2%25D0%25BE%25D1%2581%25D1%2582%25D0%25B8/portfolio/%D0%B3%D0%B0%D0%BB%D0%B5%D1%80%D0%B5%D1%8F-2018.html
Raised by: fluent_pages.views.dispatcher.CmsPageDispatcher

No published 'UrlNode' found for the path '/%D0%BD%D0%B0%D1%88%D0%B8-%D0%BD%D0%BE%D0%B2%D0%BE%D1%81%D1%82%D0%B8/portfolio/галерея-2018.html', language 'ru'.

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.