I've implemented all the required meta tags for a "summary_with_large_image" card, but I cannot make it work.
The meta tags are properly displayed in the source, even when crawled by the "Twitterbot".
Here is the validator result:
INFO: Page fetched successfully
INFO: 20 metatags were found
INFO: twitter:card = summary_card_with_large_image tag found
WARN: Not whitelisted
The URL of the page is: http://www.musesdesign.com/
I followed the Not Whitelisted, unable to render, or no image: What To Do Next guide, but everything seems to be ok.
Could you please let me know if something is wrong on our end ?