I've configured my Nginx and it gives a '403 Forbidden' I have no idea why

this is my conf

server {
        listen 80;
        listen [::]:80;

        server_name daanvandalen.com;

        root /var/www/daanvandalen.com;
        index index.php index.html;
        location / {
                try_files $uri $uri/ =404;
        }

        autoindex on;
        autoindex_exact_size off;

}