Cannot connect tot WordPress

Jetpack can’t connect tot WordPress. I’ve checked all my plugins and the theme, but there seems to be no problem. When running the Jetpack Compatibility Test I get the following results:

Site info

SITE_URL: http://www.mowl.eu
HOME_URL: http://www.mowl.eu

TEST: HTTP Connection
Array
(
[headers] => Array
(
[server] => nginx
[date] => Sun, 19 Apr 2015 10:41:35 GMT
[content-type] => text/plain;charset=utf-8
[connection] => close
[vary] => Array
(
[0] => Accept-Encoding
[1] => 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
[content-encoding] => gzip
[x-ac] => 3.lhr _sat
)

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

[cookies] => Array
(
)

[filename] =>
)

TEST: HTTPS Connection
Array
(
[headers] => Array
(
[server] => nginx
[date] => Sun, 19 Apr 2015 10:41:35 GMT
[content-type] => text/plain;charset=utf-8
[connection] => close
[vary] => Array
(
[0] => Accept-Encoding
[1] => 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
[content-encoding] => gzip
[x-ac] => 3.fra _sat
)

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

[cookies] => Array
(
)

[filename] =>
)

TEST: Self Connection
Array
(
[headers] => Array
(
[date] => Sun, 19 Apr 2015 10:41:35 GMT
[server] => Apache/2
[content-length] => 14
[connection] => close
[content-type] => text/html; charset=iso-8859-1
)

[body] => Not acceptable
[response] => Array
(
[code] => 403
[message] => Forbidden
)

[cookies] => Array
(
)

[filename] =>
)

https://wordpress.org/plugins/jetpack/