Twitter Card Not Whitelisted


Does anyone see an issue with this Twitter Card code? The validator fails and says ERROR: Card validation failed with the reason that is not whitelisted? What is whitelisted mean and how do I ensure that my site is?

<meta name="twitter:card" content="Hope Conferences presents The Reason For Our Hope, a Catholic Conference. September 30, 2017 at the Lowell Memorial Auditorium." /> <meta name="twitter:title" content="Hope Conferences - The Reason For Our Hope" /> <meta name="twitter:description" content="Catholic conference featuring great speakers" /> <meta name="twitter:url" content="" /> <meta name="twitter:image" content="" />


You’re not specifying a valid card type in the first tag. You probably want a summary or summary_large_image card.

There is more information in our pinned troubleshooting post.


Hmmm, I simplified the card tag using just Hope Conferences, but it’s still not validating.


twitter:card must be a valid card type: summary or summary_large_image. Title and description are for your own content.


@andypiper Got it. That fixed it. Thanks!

closed #6