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Warning 32503

Product: Programmable Voice

WARNING - 32503

Voice Conversation: Callback event response error.

Request to status callback URL received a response error from the customer-side server.

Possible Causes

  • This error indicates that Twilio was able to reach the customer-provided URL, however, received an error from the customer-side callback endpoint.
  • The URL provided was likely valid, but Twilio might be receiving an error from the customer-side service.

Possible Solutions

  • Make sure you have a web server up and running that serves that URL with the configured method in TwiML, e.g. POST.
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