django nginx : How to solve Server Error (500)?

Python3.7 Django2.1 centOS7 gunicorn nginx

I am setting up a production environment.

sudo gunicorn --bind 127.0.0.1:8000 myapp.wsgi:application

After executing this, if you access the IP address, error (500) will occur.

less /var/log/nginx/access.log

There is no error in checking this.

#gunicorn.conf
server {
    listen 80;
    server_name IPaddress;

    location /static {
        alias /var/www/static;
    }

    location /media {
        alias /var/www/media;
    }

    location / {
        proxy_pass http://127.0.0.1:8000;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
    }
}

What should I check?