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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api/messages/history method. You can now use the API to get the message history for all phone numbers for a specific time period using the dateFrom and dateTo parameters. Read more about the api/messages/history method.