57016: 'Topic' is empty

Twilio returns 57016 when the request includes a Topic field, but that field is empty. This error appears in the Messaging section of the Error and Warning Dictionary.

• Your request sends Topic without a value.
• Your application builds the request payload with an empty Topic value before it reaches Twilio.

• Send a non-empty Topic value in the request.
• Check the request in Twilio Error Logs or Programmable Messaging logs to confirm the value that reached Twilio, then fix the code path that leaves Topic blank.

• Debugging Your Twilio Application
• Debugging Tools