Page not found (404)

Request Method: GET
Request URL: https://tzo-kostrena.hr/en/events/kvarnerska-regata-2018/
Raised by: events.views.EventDetailView

No Event found matching the query, tried languages: en, hr

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.