[HELP] Mengatasi Jetpack eror xml_rpc-32700

Misi gan, ada masalah nih saat saya connect Jetpack ke WP. Waktu saya connect, error terus. Muncul kayak gini gan :

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://www.xxx.com/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.

Mungkin ada tau caranya?
Terimakasih.