63037: Channel Media Upload Error

Use this warning when Twilio cannot upload media to the channel provider. Twilio retries the upload automatically.

• The channel provider returned a transient upload failure.
• The MediaUrl does not point to a file Twilio can fetch and validate.
• The media file does not meet the channel's supported MIME type or size limits.

• Let Twilio retry the upload. If you resend the message, try again after the provider recovers.
• Confirm that the MediaUrl returns the expected file and that the Content-Type header matches the file contents.
• Keep the media within the channel's size limits and use a supported MIME type for that channel.

• Accepted content types for media
• Media subresource