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Request Method: GET
Request URL: http://www.minenergia.gov.co/documents/10180/23517/Resoluci%C3%B3n+4-0067-26Ene2017.pdf/d64cfb1d-a56d-4e9c-99cf-d7bf2af2797d
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.