Why is roundcube not logging in?

Question

Nginx

There is a server on Freebsd with:
Dovecot
Postfix
PHP5.6-FPM
Nginx
MySQL
PosfixAdmin
phpMyAdmin
Everything is running, but when I log in to roundcube, 504 Gateway Time-out crashes.
In nginx logs:

1  2017/03/07 02:25:46 [error] 86004#100091: *1 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 185.40.77.13, server: dataharbour.tk, request: "POST /installer/index.php?_step=3 HTTP/1.1", upstream: "fastcgi://unix:/var/run/php-fpm.sock", host: "dataharbour.tk", referrer: "http://dataharbour.tk/installer/index.php?_step=3"
     2  2017/03/07 02:37:05 [error] 86004#100091: *24 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 185.40.77.13, server: dataharbour.tk, request: "POST /?_task=login HTTP/1.1", upstream: "fastcgi://unix:/var/run/php-fpm.sock", host: "dataharbour.tk", referrer: "http://dataharbour.tk/"

I can post all the configs, tell me what you need.

Answer 1

So it also writes that the problem is with fastcgi. Do you have a php process running? Is the specified socket created?