From a quick look, it appears the CFTC might be disallowing the download from the script. You can still pull the files directly from the site and location, which is a pain.

I'll likely have to add some header parameters to let the site "see" a browser id string. I'll work on that and update the repository in the next day or so.

With the number of downloads and popularity of the article, my guess is their system saw a not insignificant amount of traffic and filtered it thinking it was bots or something. The price of popularity I guess. lol