(1) Through your cPanel, check phpinfo() to see if these functions are available – allow_url_fopen and curl_init . You can check with phpinfo().
One of them is necessary for update/install. (source)
(2) Check with Hostgator if the server where your site is hosted has access to the following url – api.www.ads-software.com. If not, have them add the IP in the hosts file.
Ramesh how do I do that?