In your application, when you create an instance of the IOBoard object, you need to pass “localhost”. This is because you will be running Breakout Server on your local computer. You’ll load your application from the external url and when it loads it will get the arduino connection locally. Don’t add the port number to the path of the external server.
You need to run Breakout Server on your local computer. Make sure Breakout Server is running before you load the external web application.