Currently, you may encounter the media-download-error when sending WhatsApp messages with attachments via the API. This error occurs when WhatsApp is unable to download the attachment from your server.
We are investigating this issue with WhatsApp and working on a resolution.
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We have added the support for the identifier parameter for interactive lists in the external Bot API. This parameter is sent with a client’s message that is generated when the client selects an item in an interactive list in WhatsApp.