Add Plugin Page Shows Error on Fresh Install of 4.0.1

I have just setup the wordpress version 4.0.1 and when i go to Add New Plugin page it takes ages to open the page and also it gives me error like “An unexpected error occurred. Something may be wrong with www.ads-software.com or this server’s configuration. If you continue to have problems, please try the support forums.”

and also the warning in file “Warning: An unexpected error occurred. Something may be wrong with www.ads-software.com or this server’s configuration. If you continue to have problems, please try the support forums. (WordPress could not establish a secure connection to www.ads-software.com. Please contact your server administrator.) in /home/swati3cw/public_html/wp-admin/includes/plugin-install.php on line 77”