Dobrý den, mám problém s instalací pluginu JETPACK na WordPress. Po aktivaci pluginu a kliknutí na Připojit se k WordPress.com se zobrazí chyba:

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.
Detaily chyby: The Jetpack server could not communicate with your site's XML-RPC URL. Please check to make sure http://test-jetpacku.8u.cz/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.

Nevíte prosím, kde by mohla být chyba? Děkuji, Zuzka