Nginx, Supervisor work fine. But my site has time out error!

Hi, my site was work fine. But it’s error timeout now. What can i do? Thanks. http://omerfaruksahin.com.tr/

$ sudo supervisorctl omerfaruksahin_com_tr 
omerfaruksahin_com_tr            RUNNING    pid 19125, uptime 0:23:22

$ sudo nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful