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Voice Conversation: Callback event response error.

WARNING: 32503

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

Possible Causes

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  • 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.
  • 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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