Simple lumen nginx conf

default

server {
    listen 80 default_server;
    listen [::]:80 default_server ipv6only=on;

    listen 443 ssl;
    
    root /var/www/lumen/public;
    index index.php index.html index.htm;

    server_name server_domain_or_IP;
    ssl_certificate /etc/nginx/ssl/nginx.crt;
    ssl_certificate_key /etc/nginx/ssl/nginx.key;

    location / {
        try_files $uri $uri/ /index.php?$query_string;
    }

    location ~ \.php$ {
        try_files $uri /index.php =404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass unix:/var/run/php5-fpm.sock;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include fastcgi_params;
    }
}

@JeancarloFontalvo

I could not find any .htaccess file by default created by Lumen. Nevertheless look closely if you configured the root ...; correctly. This should point to the Lumen directory slash public. So. /var/www/yourdirectory/or/sub/directory/public. The public folder is created by Lumen during setup. In fact there only exist 1 single index.php file within this public folder.

You also may need to change the location / { part, let's say you have an API that should be access from yourdomain.com/api. You may want to use location /api { here.

Finally, /index.php?$query_string; could be right, yet again depending on the root. This can also change to eg. /api/index.php?$query_string;

EDIT:
Are you got mine working example:
https://gitlab.melroy.org/snippets/18