Between 2021-05-14 18:00:0 UTC and 2021-05-15 15:30:00 UTC, the following cards endpoints were incorrectly creating cards where the card_uri would be null. Cards created without the card_uri field cannot be used in Tweets.

Recommended Next Steps

We are investigating whether it is possible to recreate the card_uri field data. If this is blocking advertisers, all cards created during this time using the endpoints listed above and missing the card_uri field should be recreated. After being successfully recreated, we recommend deleting the cards.

Twitter Ads API team

On May 19th, we completed a process to populate the card_uri fields for cards that were created during this period. Advertisers are now be able to use these in Tweets.