Minify URL and Page Cache URL rewriting not working on nginx

I got errors

W3 Total Cache error:It appears Minify URL rewriting is not working. Please verify that all configuration files are included in the configuration file (and that you have reloaded / restarted nginx).
Unfortunately minification will not function without custom rewrite rules. Please ask your server administrator for assistance. Also refer to the install page for the rules for your server.
Technical info
nginx configuration file contains rules to rewrite url https://yarimdebriyaj.com/wp-content/cache/minify/000000/w3tc_rewrite_test. If handled by plugin, it returns "OK" message.
The plugin made a request to https://yarimdebriyaj.com/wp-content/cache/minify/000000/w3tc_rewrite_test but received:
502 Bad Gateway
instead of "OK" response.

W3 Total Cache error: It appears Page Cache URL rewriting is not working. Please verify that all configuration files are included in the configuration file (and that you have reloaded / restarted nginx).
Unfortunately disk enhanced page caching will not function without custom rewrite rules. Please ask your server administrator for assistance. Also refer to the install page for the rules for your server.
Technical info
nginx configuration file contains rules to rewrite url https://yarimdebriyaj.com/w3tc_rewrite_test into https://yarimdebriyaj.com/?w3tc_rewrite_test which, if handled by plugin, return "OK" message.
The plugin made a request to https://yarimdebriyaj.com/w3tc_rewrite_test but received:
502 Bad Gateway
instead of "OK" response.

I included var/www/nginx.conf with w3 total cache settings in nginx/sites-available/default

What can i do?

Nginx 1.6.0 with PHP5-FPM

https://www.ads-software.com/plugins/w3-total-cache/