Jetpack site_inaccessible (xmlrpc ok)

I forgot : I also tried to use the twenty eleven theme for the tests in case it could be a theme incompatibility issue. But it didn’t work.

I have same problems and tried same solutions…
but, whe i activate the jetpack plugin my admin page became inaccessible.

My site is here: https://www.sermais.it

I also installed “Jetpack compatibility test” that give me this result:
……………………………………………………………..
Site info

SITE_URL: https://sermais.it
HOME_URL: https://sermais.it

TEST: HTTP Connection
Array
(
[headers] => Array
(
[server] => nginx
[date] => Sun, 06 Oct 2013 23:03:47 GMT
[content-type] => text/plain;charset=utf-8
[connection] => close
[vary] => Cookie
[x-pingback] => https://jetpack.wordpress.com/xmlrpc.php
[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
)

[body] => OK
[response] => Array
(
[code] => 200
[message] => OK
)

[cookies] => Array
(
)

[filename] =>
)

TEST: HTTPS Connection
Array
(
[headers] => Array
(
[server] => nginx
[date] => Sun, 06 Oct 2013 23:03:48 GMT
[content-type] => text/plain;charset=utf-8
[connection] => close
[vary] => Cookie
[x-pingback] => https://jetpack.wordpress.com/xmlrpc.php
[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
)

[body] => OK
[response] => Array
(
[code] => 200
[message] => OK
)

[cookies] => Array
(
)

[filename] =>
)

TEST: Self Connection
Array
(
[headers] => Array
(
[date] => Sun, 06 Oct 2013 23:03:48 GMT
[server] => Apache/2
[x-powered-by] => PHP/5.3.9
[expires] => Thu, 19 Nov 1981 08:52:00 GMT
[cache-control] => no-store, no-cache, must-revalidate, post-check=0, pre-check=0
[pragma] => no-cache
[set-cookie] => PHPSESSID=midthf6vpf0h1ia19ih09th834; path=/
[vary] => Accept-Encoding,User-Agent
[connection] => close
[content-type] => text/plain
)

[body] => XML-RPC server accepts POST requests only.
[response] => Array
(
[code] => 200
[message] => OK
)

[cookies] => Array
(
[0] => WP_Http_Cookie Object
(
[name] => PHPSESSID
[value] => midthf6vpf0h1ia19ih09th834
[expires] =>
[path] => /
[domain] =>
)

)

[filename] =>
)
.......................................................................

I Hope you can help me in some way.

@basilo: could you start your own thread please, so we can deal with your issue independantly?

@sandrino: Can you please use Jetpack’s Debugger module to send us some more information about your site?

1) Go to the Jetpack page in your dashboard.
2) Click on “Help” tab in the upper right side of the page and click the link for “Jetpack Debugging Center.”
3) Click the link that says “click here to contact Jetpack support.”
4) Fill in the description box and your name and email address.
5) Click the “Contact Support” button.

Thanks!