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Voice User-Defined Message: Request to subscription callback URL encountered error



WARNING: 32711

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PROGRAMMABLE VOICE
WARNING

Twilio received an error response when attempting to send a User-Defined Message event to the UserDefinedMessageSubscription callback URL.

Possible Causes

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  • 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.

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