It just means you can't access your internal addresses via your external address from an internal address if that makes sense. You need to try accessing your application via a 4G signal, or from elsewhere.
NAT loopback, right I can access the server fine on my internal IP address whilst at home say on my ip, by its internal lp address , so to check if I can access it from out side I needed to use 4 g or maybe BT wifi with fon ?
Yep
Thanks, I am off to another island tomorrow I try from there via 4 g