HTML Report Error

Attempts to download html and pdf reports from the "Reports" plugin result in a page that says "Error 404- The requested Url [/admin/ etc. etc. .zip] was not found on this server."

No information regarding account plugin errors seems to be available. Does anyone know why this isn't working or how to fix it? It has worked previously, as recently as Nov. 6th 2014

Questions about should go directly to their contact page.