Page not found (404)

Request Method: GET
Request URL: http://172.20.0.4/en/concerts/vselennaya-organ-ekaterina-mochalova-mandolina-i-andrej-bardin-organ/
Raised by: contents.views.EventDetail

No Концерт 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.