In the flow runs page, you should be able to see the specific error that is given by the action.
Additionally, this can happen if the media content is invalid or not in expected format.
Can you please verify that the media is indeed available to rendered ?
Sorry for the trouble. The media link would not work since the twitter action takes media parameter in the form of raw bytes.
It is designed for the scenarios like - "When a new image is added to dropbox, post it to twitter". In this case the raw bytes returned by dropbox trigger would be passed as media parameter to twitter connector.
Agree that its not intuitive for the customers. Will take this feedback to the team.
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