proconlatte.com blocked Rated 3 out of 5 stars

I just installed ProCon Latte, and I tried to get the web page proconlatte.com y it get a wite page saying "error..." I uninstalled the addon and I got the page, I re-installed it and again a page saying "error ...". This happens even if I check on the "enable whitelist" option. Am I doing somethinng wrong? Thanks. I want to get the page to read the help or the faqs.

This review is for a previous version of the add-on (3.3.1-signed).