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My video is not playing properly in the Player Card.My Card information now refreshes, but images are not updating.I updated my site meta tags, but my Tweet shows the old Card.My Tweet shows an outdated version of my Card.My Card does not appear in the timeline.My Tweet is missing the image/video/summary text.The validator cannot reach my testing or staging environment.I get the message, "ERROR: Fetching the page failed because the response is too large.".I get the message, "Invalid card type.".I get the message, "Caught Exception in App Proxy Service.".I get the message, "Failed to get a proxied URL for the image." (or an image is not shown).I get the message, "ERROR: Fetching the page failed because the request timed out.".If you are unable to find the solution to an issue here, please use the Twitter Cards category on the developer forums. Use this troubleshooting guide to help to identify and resolve commonly encountered issues during Cards development.