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Request URL: http://minenergia.gov.co/documents/10180/488888/Capitulo_1_+Introduccion_final_.pdf/0a5ed46f-3e54-4b3a-ac56-ea839bf5b803
Raised by: wagtail.documents.views.serve.serve

This document does not match the given filename.

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.