Usually when this happens there is a problem while connecting to WPAdverts updates server via SSL connection, you can try switching to non-secure connection by adding the code below in your theme functions.php file
add_action( "plugins_loaded", "non_ssl_updates_url");
function non_ssl_updates_url() {
include_once ADVERTS_PATH . 'includes/class-updates-manager.php';
Adverts_Updates_Manager::$url = "http://wpadverts.com/api";
}
If this will not help please email me (via https://wpadverts.com/contact/) your license code i will check it.
Added code to function.php no chnage. Have emailed you.
Ok, i am just checking my emails but i cannot seem to find a message from you, if you will not receive a message from support at wpadverts in about hours most likely the email you sent is not in my inbox nor in the spam folder.