Hello. Clearing the cache does not work. When you delete the cache manually at http://test/purge/post-link, then everything works fine. If we add a new comment or write, then clearing the cache does not occur. The logs nginx helper shows that removed successfully, but actually clearing the cache does not occur.
nginx 1.4.7
ngx-cache-purge-2.1
wordpress 3.8.1
nginx helper 1.8