Why is the Zabbix web interface not working?

Question

linux

I configure Zabbix+Nginx+MySQL+PHP. I installed everything, all services are running, Iptables rules are there, directory rights are configured. But when I try to login to the web face of Zabbix, there is nothing but - "page not available, HTTP ERROR 500"
nginx.conf:

server {
                listen 8081;
                server_name localhost;
                root /usr/share/zabbix;

                location / {
                        index index.php index.html index.htm;
                }

                location ~ .php$ {
                        fastcgi_pass 127.0.0.1:9000;
                        fastcgi_index index.php;
                        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                        include fastcgi_params;
                        fastcgi_param PHP_VALUE "
                        max_execution_time = 300
                        memory_limit = 128M
                        post_max_size = 16M
                        upload_max_filesize = 2M
                        max_input_time = 300
                        date.timezone = Europe/Moscow
                        always_populate_raw_post_data = -1
                        ";
                        fastcgi_buffers 8 256k;
                        fastcgi_buffer_size 128k;
                        fastcgi_intercept_errors on;
                        fastcgi_busy_buffers_size 256k;
                        fastcgi_temp_file_write_size 256k;
                }
        }

What could be the problem?

Answer 1

1. Which Linux distribution? If centos, have you tried disabling SELinux and firewall?
2. What link do you use to go to the web interface? The default is usually ip\zabbix