13233: Dial->Conference: Invalid waitUrl

Set waitUrl on <Conference> to a well-formed relative or absolute URL, or set it to '' if you do not want to play anything before the conference starts. The waitUrl endpoint can return an MP3 file, a WAV file, or a TwiML document.

• You passed a waitUrl value that is not a well-formed URL.
• You provided a value that is neither a relative or absolute URL nor the empty string ''.
• You intended to play hold audio or TwiML before the conference starts, but the waitUrl value does not point to a valid endpoint Twilio can request.
• You intended to disable waiting audio, but you used a placeholder or invalid value instead of the empty string ''.

• Update waitUrl to a valid relative or absolute URL.
• If you do not want to play anything while callers wait for the conference to start, set waitUrl to ''.
• Make sure the waitUrl endpoint returns supported content such as an MP3 file, a WAV file, or a TwiML document.
• If waitUrl returns TwiML, use only supported verbs such as <Play>, <Say>, <Pause>, and <Redirect>.
• If you need a simple hosted endpoint for valid TwiML, use a TwiML Bin and return properly formed TwiML from that URL.

• TwiML <Conference>
• Voice Conference
• Get Started with TwiML Bins