31503: Service Unavailable

The server is currently unable to handle the request due to a temporary overloading or maintenance of the server. This error can also be caused by the Application SID provided in the access token pointing to an inaccessible URL.

• The server is under maintenance.
• The Application SID provided in the access token points to an inaccessible URL.

Please check the Application SID URL. For further assistance, please contact help@twilio.com.