Banned from Chimpfeedr?

I've had no problem using Chimpfeedr to compile RSS feeds for autoblogs before, but now that Im attempting to create a new autoblog, every time I insert RSS feeds into the Chimpfeedr main page, I get a message that says "no valid URL provided." I know this is bull because I tested it with an RSS that I was able to input successfully previously.

Which makes me wonder, was I possibly banned from Chimpfeedr? Do RSS aggregators ever ban users? Just a site glitch I should let pass?