Facebook share throwing connection error when sharing

Every article on the following website fails when attempting to share the page via the share link in our social media widget.

for example:

the following page, http://ift.tt/19F2fSk when shared via the following link:

Returns a "Error: Connection error" in the share preview window. Response headers for this request are:

Cache-Control: private, no-cache, no-store, must-revalidate Content-Encoding: gzip Content-Type: text/html Date: Wed, 01 Apr 2015 14:22:20 GMT Expires: Sat, 01 Jan 2000 00:00:00 GMT Pragma: no-cache Strict-Transport-Security: max-age=15552000; preload Vary: Accept-Encoding X-Content-Type-Options: nosniff X-FB-Debug: iYvCJSRJJqVdVXyIubD1kVq6teZBILIBRrCACZW9hI/Ms+B2qsquq52KyU5820UTfLmuXTis3LbRoL2bMlCVBw== X-Frame-Options: DENY X-XSS-Protection: 0 X-Firefox-Spdy: 3.1

200 OK

running the above URL through the OpenGraph object debugger returns:

"Error parsing input URL, no data was cached, or no data was scraped." and the scraper sees the following for the URL:

"Document returned no data"

We need to determine the cause of this since none of our content can be shared from our site at the moment.

Any ideas, tips greatly appreciated!