Twitter Cards error with SSL

PERSPECTIVU · 2014-06-25T10:40:37.000Z

The Twitter Cards validator throws the following error on our site: Fetching the page failed due to an internal error.
I checked that meta tags and robots.txt are present and correct. I also checked the file size limits for image and the site.
I think the problem may be related to the SSL certificate. We are using a standard certificate from gandi.net.

Example link
https://www.perspectivu.com/article/watching_soccer

dclauzel · 2014-08-27T22:40:33.000Z

Same problem with this page: https://damien.clauzel.eu/twitter.xhtml

Content is valid, the page is online, but the validator fails and says “Fetching the page failed due to an internal error, debugId: 1409179000-333533”

The TLS certificate is correct, signed by CAcert.

andypiper · 2014-08-28T10:51:27.000Z

When I load your site in Firefox I get a message that the site is untrusted and the SSL cert is insecure.

dclauzel · 2014-08-28T10:54:37.000Z

The TLS certificate is valid; Google crawls the web site without warnings in the webmaster tools.

The TLS certificate is signed by CAcert. It is possible that you don’t have their root certificates http://www.cacert.org/index.php?id=3

andypiper · 2014-08-29T15:16:11.000Z

Chrome and Firefox don’t trust the site for me (yes, it’s possible I don’t have the right certs). I suspect that could be the case with the cards crawler too, though.