Jetpack Contact Form stopped working

Hi,

the contact form of my support page stopped working. When I open the editor for the page the contact-form block gives me this error message: “
Your site doesn’t include support for the “jetpack/contact-form” block. You can leave this block intact, convert its content to a Custom HTML block, or remove it entirely.”

I tried to troubleshoot it myself. Checked “xmlrpc.php” and got the correct response: “XML-RPC server accepts POST requests only.”

So I don’t know how to continue my search for the spoilsport. Please advise.

Thanks!

The page I need help with: [log in to see the link]