Problema con Jetpack

Salve, ho un problema con Jetpack;
una volta installato il plugin, seguo le istruzioni e cerco di connettermi a wordpress.com tramite l'apposito pulsante ma mi esce il seguente errore.

Your Jetpack has a glitch. Something went wrong that’s never supposed to happen. Guess you’re just lucky: xml_rpc-32700
Try connecting again. Error Details: The Jetpack server could not communicate with your site's XML-RPC URL. Please check to make sure http://gsbernatese.altervista.org/xmlrpc.php is working properly. It should show 'XML‑RPC server accepts POST requests only.' on a line by itself when viewed in a browser and should not have any blank links or extra output anywhere.
Dismiss this notice.

To enable all of the Jetpack features you’ll need to connect your website to WordPress.com using the button to the right. Once you’ve made the connection you’ll activate all the delightful features below.

Ho già provato a seguire un po' di guide sul web ma nulla. Suggerimenti?

Salve, ho un problema con Jetpack;
una volta installato il plugin, seguo le istruzioni e cerco di connettermi a wordpress.com tramite l'apposito pulsante ma mi esce il seguente errore.

Your Jetpack has a glitch. Something went wrong that’s never supposed to happen. Guess you’re just lucky: xml_rpc-32700
Try connecting again. Error Details: The Jetpack server could not communicate with your site's XML-RPC URL.

Anche io ho lo stesso problema. Nessuna soluzione ?