Create a blank page on your web site with this code:
$ch = curl_init('https://tlstest.paypal.com/');
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
$data = curl_exec($ch);
That should give you a message telling you what needs to be updated. Then send that to your hosting provider and have them correct the issue.