14221: Enqueue: Provided Attributes JSON was not valid

You receive this error when <Enqueue> includes a <Task> noun whose body is not a valid JSON object. When you use workflowSid with <Enqueue>, Twilio creates a new TaskRouter Task for the call, and the <Task> noun sets the attributes for that Task.

• The <Task> noun body contains JSON that Twilio cannot parse as a valid object.
• Your application generated malformed task attributes before returning the TwiML response for <Enqueue>. Twilio expects those attributes to be formatted as JSON.
• Custom task attributes were added to a TaskRouter enqueue flow, but the value sent in <Task> was not valid JSON.

• Update the <Task> noun body so it contains a valid JSON object before Twilio executes the <Enqueue> verb.
• If you generate TwiML in code, build the attributes as an object and serialize them with JSON.stringify instead of hand-writing the JSON string.
• If you do not need custom task attributes, omit <Task>. Twilio will still create the Task with the call's standard parameters as attributes when you enqueue with workflowSid.

• TwiML <Enqueue>
• Queueing calls with TaskRouter
• Task Resource