Hmm yeah looks like https://whois.net/ is having some problems today and is showing that your domain name is not registered: “prolicious.in is not registered.”
The problem looks like some sort of DNS problem with the www subdomain so this would still be something that your host should help you with. Or if you are familiar with changing DNS settings then check the www subdomain in your host control panel.
The server at http://www.prolicious.in can’t be found, because the DNS lookup failed. DNS is the network service that translates a website’s name to its Internet address. This error is most often caused by having no connection to the Internet or a misconfigured network. It can also be caused by an unresponsive DNS server or a firewall preventing Google Chrome from accessing the network.