Au cas ou, je donne mon error.log:
GNU nano 2.2.6 File: /var/log/nginx/error.log
2017/06/24 14:55:51 [emerg] 31700#31700: unknown directive "scgi_param" in /etc/nginx/scgi_params:2
2017/06/24 14:55:51 [emerg] 31720#31720: unknown directive "scgi_param" in /etc/nginx/scgi_params:2
2017/06/24 14:55:59 [emerg] 31757#31757: unknown directive "scgi_param" in /etc/nginx/scgi_params:2
2017/06/24 15:10:28 [emerg] 2283#2283: unknown directive "scgi_param" in /etc/nginx/scgi_params:2
2017/06/24 15:10:28 [emerg] 2303#2303: unknown directive "scgi_param" in /etc/nginx/scgi_params:2
2017/06/24 15:10:34 [emerg] 2333#2333: unknown directive "scgi_param" in /etc/nginx/scgi_params:2
2017/06/24 15:12:37 [emerg] 2447#2447: unknown directive "scgi_param" in /etc/nginx/scgi_params:2
2017/06/24 15:12:38 [emerg] 2466#2466: unknown directive "scgi_param" in /etc/nginx/scgi_params:2
2017/06/24 15:12:49 [emerg] 2498#2498: unknown directive "scgi_param" in /etc/nginx/scgi_params:2