I’ve setup the meta tags in our Materials pages, and I’ve used the validator to make sure it’s working.
Sample URL is here http://lessonpix.com/materials/181422/Fluency+Strategy+Spinner
It looks great in the validator and there are no missing element.
But when I submit it, I get this message by email:
"The URL you provided for lessonpix.com to use the summary_large_image card did not validate. Please make sure the page contains valid metadata, then reapply for a Twitter card."
Can anyone help?