31400: Bad Request

This error means Twilio could not understand the request because the syntax was malformed. 31400 is a Voice error with the message Bad Request.

• The request body or parameters are malformed, so Twilio cannot parse the request.
• The request uses an unsupported content type instead of application/x-www-form-urlencoded or multipart/form-data.
• If you are using device.connect(), the params value is not a JavaScript object of key/value pairs, or the call data you send does not match what the Voice SDK expects.

• Rebuild the request with valid syntax and include every required field before you send it.
• Send Twilio API requests with a supported content type.
• If you are using device.connect(), pass params as a JavaScript object of key/value pairs, and keep the total length within 800 bytes.

• Twilio API requests
• Voice SDK Error Codes