Comment one directive. You have both uncommented. just do this as mine.

pass PHP scripts to FastCGI server

    #
    location ~ \.php$ {
            include snippets/fastcgi-php.conf;
    #
    #       # With php-fpm (or other unix sockets):
            fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;
    #       # With php-cgi (or other tcp sockets):
    #       fastcgi_pass 127.0.0.1:9000;
    #}

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    location ~ /\.ht {
            deny all;
    }

}

Open your /etc/nginx/sites-enabled/default and find fastcgi_pass you have written two times. remove one <br>Example <br>location ~ .php$ { <br> fastcgi_split_path_info ^(.+.php)(/.+)$; <br> # NOTE: You should have “cgi.fix_pathinfo = 0;” in php.ini <br> <br> # # With php5-cgi alone: <br> fastcgi_pass 127.0.0.1:9000; <br> # # With php5-fpm: <br> fastcgi_pass unix:/var/run/php5-fpm.sock; <br> fastcgi_index index.php; <br> include fastcgi_params; <br> <br> }

As it says, you got the fastcgi_pass variable two times in your configs. Remove one of em.