I have been unable to get my cards to validate. I am using the Yoast Wordpress SEO plugin. All meta tags are present in the source code, but the validator continually fails.
Sometimes I just get the message “Unable to render Card preview” but usually it is accompanied by a log message “ERROR: FetchError:exceeded 4.seconds to Portal.Pink-constructor-safecore while waiting for a response for the request, including retries (if applicable) (Card error)”.
That’s very similar to the message in the troubleshooting documentation, “exceeded 15.seconds to pink-floyd while waiting for a response for the request, including retries (if applicable)”, although not exactly the same. I have reviewed the troubleshooting steps and have made sure that the robots.txt and .htaccess files are set up properly to allow access.
What else am I doing wrong?
An example post is http://blogs.angelo.edu/2015/01/06/preparing-gre/.