Guys.. work fine but you have to use: try_files, not tryfiles.. like code below

location / {
        # First attempt to serve request as file, then
        # as directory, then fall back to displaying a 404.
        try_files $uri $uri/ /index.php?q=$uri&$args; 
        #try_files $uri $uri/ =404;
        # Uncomment to enable naxsi on this location
        # include /etc/nginx/naxsi.rules
    }

Hi MARKOVIC.ANDRIJA,
It's seems like you did not configured your server configuration file in /etc/nginx/sites-available folder properly.
Check that you have put
tryfiles $uri $uri/ /index.php?q=$uri&$args;
instead of
tryfiles $uri $uri/ =404;
It will fixed your 404 error hopefully.
Thank You
M A Kashem
CEO
Xponent Info System (PVT.) LTD.

It's not work for me either.

This worked for me, replaced the mention portion with

try_files $uri $uri/ /index.php?q=$uri&$args;

Don't forget after you will need to reload ngix

sudo service ngix reload

If you having any problem with 404 errors. please visit.
Acer Tech Support