I am getting this error for the first time on all the pages on my site starting this morning. I have checked all the suggested troubleshooting tips. The interesting thing is here is a cached version of a card for a page I have not modified:
http://www.tennisrecruiting.net/article.asp?id=2495
If I add an additional parameter to the querystring, I get the “No metatags found” error:
http://www.tennisrecruiting.net/article.asp?id=2495&v=2
This is just an issue with the Validator. The cards appear to display fine in the tweets. It’s always nice to check them before sending out, though.