Problem in communication between Jetpack and your site

On /wp-admin/admin.php?page=jetpack-debugger I get the following error:

SELF:
	Array
(
    [headers] => Array
        (
            [server] => nginx
            [date] => Sun, 03 Apr 2016 22:26:41 GMT
            [content-type] => text/plain;charset=utf-8
            [connection] => close
            [expires] => Wed, 11 Jan 1984 05:00:00 GMT
            [cache-control] => no-cache, must-revalidate, max-age=60
            [pragma] => no-cache
            [x-hacker] => Jetpack Test
            [x-ac] => 3.dca _dca
            [strict-transport-security] => max-age=15552000
        )

    [body] => {"error":"Could not fetch your site data","error_description":"We were unable to fetch the data from your Jetpack-powered site, the communication channel seems to be broken."}
    [response] => Array
        (
            [code] => 400
            [message] => Bad Request
        )

    [cookies] => Array
        (
        )

    [filename] =>
)

site

About Known issues:

• Not using mentioned plugins. Had WPML installed but not activated -uninstalled it.
• HTTPS: No
• WP Engine host: No
• Server: Litespeed
• XMLRPC file: works
• Development Mode: never touched it.

Also on cPanel Errors, I found Automattics' IP's with

[INFO] [Automattics' ip:port] File not found [[...]/public_html/403.shtml]

https://www.ads-software.com/plugins/jetpack/