Cards validator: "ERROR: Fetching the page failed because the request timed out."

[lime_company]

Hello, I am not able to validate the cards on my blog (http://getlime.io/blog/2015/12/31/startup-lessons-the-twitter-account/) using the cards validator:

I always get the same timeout error:

ERROR: Fetching the page failed because the request timed out.

I am using Wordpress on private hosting and SEO plugin by Yoast to add social meta tags.

Any help would be appreciated!