Ajax requests to the site for "Vkontakte" does not work?

Question

JavaScript

Good afternoon everyone. Yesterday I transferred the site from the hosting to my server under Ubuntu 14.04, which runs on WP. After the transfer, news from the site to the VKontakte group was no longer automatically parsed.

Even if you write the site address on the wall, nothing happens.

Didn't change anything. Apache + php5 + mysql
is installed on the server. Before the server, there is also a router with forwarding of the only port 80.

access.log

[26/Nov/2014:12:38:32 +0400] "POST /wp-admin/admin-ajax.php HTTP/1.1" 200 581 " http://***.ru/wp-admin/plugins. php " "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.65 S$
5.16.68.100 - - [26/Nov/2014:12:40:12 +0400]" POST /wp-admin/admin-ajax.php HTTP/1.1" 200 581 " http://***.ru/wp-admin/plugins.php " "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.65 S$

This is what he writes when VK tries to take a picture or description from my site, when inserting a link to my site on the wall.

What is the problem? where to dig?

Answer 1

Digging into error.log and not into access.log