Jetpack Connectivity Problem. This site cannot be accessed.

Hi,

My blog is relevantly new and it is hosted on BlueHost.(I have another blog on BlueHost – no problems with JetPack there).

Recently i noticed that my post not been publicized on Google Plus and Twitter, so I went to JetPack Publicize settings and tried to reconnect my Google Plus account and got Error code: -10520.

In addition, when I go to WordPress.com Stats I seen red icon on my site with this message: This site cannot be accessed. Disconnect Site

Some other JetPack plugins seems like working.

When I click on Debug in JetPack this is what I get:

It looks like your site can not communicate properly with Jetpack.
SELF:
Array
(
[headers] => Array
(
[server] => nginx
[date] => Wed, 06 Apr 2016 07:18:39 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.sjc _bur
[strict-transport-security] => max-age=15552000
)

[body] => {“error”:”Unknown Error”,”error_description”:”An unknown error has occurred.”}
[response] => Array
(
[code] => 400
[message] => Bad Request
)

[cookies] => Array
(
)

[filename] =>
)

Please assist,
Thanks