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.
Corrected the link in the email about the violation of the rules or policies for using WhatsApp. The link now works correctly and takes you to documentation and instructions on how to appeal.
See the instructions for more information: