Service discovery and load-balancing not working using ingress-nginx

Following this article to use ingress-nginx to deploy applications using ingress resource.
I am using UCP 3.0.2 on my private infra and have edited my local /etc/hosts file to add a dns entry called to route and load-balance traffic to my application using ingress-nginx

It was working fine but few days back all of a sudden when I give,it keeps loading and the webpage is not shown.

what could be the possible reasons please help?