Twitter Cards is "currently not following our Player Card guidelines "

I have just received the following message from Twitter, and I would appreciate your help.

We’re writing to let you know that your Twitter Player Card for [my website domain] is currently not following our Player Card guidelines (https://dev.twitter.com/docs/cards/types/player-card). Compliance with these guidelines is a mandatory component of Player Card use. Please refer to the complete Player Card guidelines for full details, but your service is currently non-compliant with the following points:

— We are unable to review your experience since it appears that the Player Card is not being utilized for the domain [my website domain]. Please respond with a functioning example URL if you are in fact using this Card type.

Please confirm that you will make the required changes to bring your service into compliance by October 28th. When these changes are deployed, please notify us as well. If, however, your application is not made compliant by this deadline, we will take steps to enforce our policies. Please let us know if you have any further questions and we look forward to your cooperation.

You can respond to this message by replying from the address this email was sent to. If you respond from a different forwarding address or email alias (i.e. [email protected]) your email will not be seen by our support staff. If you have a Twitter account associated with this email address, you can also update and review this ticket online by clicking the ticket link above. If you’re unable to log-in and respond to this ticket directly, you can file a new ticket by going to https://support.twitter.com/forms/platform and selecting “I have an API policy question not covered by these points.”

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