63019: Media failed to download

This error occurs when Twilio can't download media associated with a message. When this happens, the media retrieval returns 0 bytes.

• The media attached by the sender could not be downloaded successfully.
• The media request succeeded but returned an empty file with 0 bytes.
• If you send outbound media with MediaUrl, the URL may not be serving the expected file or the Content-Type header may not match the actual media type. Twilio validates media URLs with GET and HEAD requests.
• The media may not meet channel requirements, such as supported MIME types or size limits. For example, outbound MMS media must stay within 5 MB total and outbound WhatsApp media must stay within 16 MB, with WhatsApp images limited to 5 MB.

• Check that the media file has content before retrying. If the file contains 0 bytes, upload a new copy or ask the sender to resend the attachment.
• Review the failed Message record or your StatusCallback payload to confirm the message status, error_code, and error_message.
• If you provide a MediaUrl, make sure the URL is publicly reachable by Twilio, serves the correct file, and returns a Content-Type header that matches the media you intend to send.
• Ensure media meets the supported file types and channel size limits before retrying.

• Accepted content types for media
• Twilio's request to your incoming message webhook URL
• Guidance on WhatsApp media messages