Nginx Subdomain index.html problem

Hello

I just install NGINX + ISPConfig3 but i have problems with subdomains.
I just create one over Admin. Redirection no flag or last but when i have
index.html i cant access subdomain like http://some.mysite.com only with /index.html

BUT when i have index.php i can access subdomain without /index.php

So where is problem? Why i can access subdomain without /index.html and nginx send me Error 500 but with index.php no...

Code:

server {
        listen *:80;
		
        
        server_name MYDOMAINl.com *.MYDOMAIN.com game.MYDOMAIN.com;

        root   /var/www/MYDOMAIN/web;
		
		
		
        if ($http_host ~* "^game.MYDOMAIN.com$") {
            rewrite ^/(.+)$ /subtest/$1 last;
        }
		
        index index.html index.htm index.php index.cgi index.pl index.xhtml;

 

+ Additional info

When i have in /var/www/MYDOMAIN/web file index.html
and index.html in my subdomain folder

== Work

But when in my root /var/www/MYDOMAIN/web have index.php

and in subdomain folder different type like index.html ISPConfig 3 redirect me to .php

== Error 404

So how to setup subdomains on NGINX with ISPConfig 3 without this problems?

 

Can you post the full nginx vhost?

Are there any errors in the website's error log?