Page not found (404)

Request Method: GET
Request URL: http://www.redeunida.org.br/en/congresso2016/?month:int=8&year:int=2016&orig_query=
Raised by: subsites.views.SubSiteView

No SubSitePage 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.