63029: The receiver failed to download the template

This error occurs when the recipient cannot download a WhatsApp template. For WhatsApp messaging, this condition corresponds to WhatsApp error 2002. If your template includes media or URL-based actions, verify that each referenced resource is public and reachable before you retry the message.

• The recipient's device or WhatsApp client could not download the template.
• A media template references a file that is not publicly hosted, does not resolve correctly, or uses a file type that is not supported for WhatsApp templates.
• A template button URL does not resolve to a publicly accessible website.
• The destination number or handset could not receive the template successfully at the time of delivery.

• Check the destination number and handset, then retry the message.
• If the template includes media, host the file at a public URL, confirm the URL resolves successfully, and use a supported WhatsApp template media type such as JPG, JPEG, PNG, PDF, or MP4.
• If the template includes a URL button, make sure the URL resolves to a publicly accessible website. If the URL uses variables, provide a valid sample path in the template.
• Send templated WhatsApp messages with ContentSid and ContentVariables. Confirm the template is approved and configured correctly before you send it.
• If you need a delivery fallback after a failed WhatsApp attempt, configure channel fallback to SMS and include both the recipient's phone number and WhatsApp address.

• Send WhatsApp notification messages with templates
• twilio/media
• Channel Fallback