GET parameters not working with NGINX

I have a WordPress running on nginx (with PHP-FPM), everything works fine except that the GET parameters (for example, when I click on a video to request it), which despite appearing at the top with the URL, does not work. It is as if in the backend no parameters were passed.

On the location block i have this:

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

I have tried with the following without success:
try_files $uri $uri/ /index.php?$query_string;
try_files $uri $uri/ /index.php?$request_uri;

Where else can I make modifications to make it work?
The .php block? Virtualhosts?