redhat安装magento2.4.5之后，网站打不开，请大佬帮忙看看nginx配置是否有问题

我自己装的nginx1.18，nginx.CONF文件是

1 user nginx;
2 worker_processes 1;
3
4 error_log /var/log/nginx/error.log;
5
6 events {
7 worker_connections 1024;
8 }
9
10
11 http {
12 include mime.types;
13 default_type application/octet-stream;
14
15 access_log /var/log/nginx/access.log;
16
17 #include /etc/nginx/conf.d/*.conf;
18 upstream fastcgi_backend {
19 # use tcp connection
20 # server 192.168.1.18:9000;
21 # or socket
22 server unix:/var/run/php-fpm/www.sock;
23 }
24 server {
25 listen 80;
26 server_name 127.0.0.1;
27 set $MAGE_ROOT /var/www/html;
28  include /var/www/html/nginx.conf.sample;
29 #include /etc/nginx/default.d/*.conf;
30 }
31
38 }
~

访问直接报500错误。请问我如何排查？nginx我改了很多次了，但是都不起作用。

该网页无法正常运作

192.168.1.18 目前无法处理此请求。