32711: Voice User-Defined Message: Request to subscription callback URL encountered error
PROGRAMMABLE VOICE
WARNING
Twilio received an error response when attempting to send a User-Defined Message event to the UserDefinedMessageSubscription callback URL.
- The UserDefinedMessageSubscription callback URL is incorrect.
- Your endpoint at the UserDefinedMessageSubscription callback URL was not responding or responded with a 400- or 500-level HTTP status code.
- Make sure that the UserDefinedMessageSubscription callback URL is correct.
- Make sure that your endpoint at the UserDefinedMessageSubscription callback URL can successfully receive and respond to requests with 200-level HTTP status codes.