How can I configure my Nginx file to correctly display my React app?

Question

I've got my build folder on my server and I assume I've correctly configured nginx to be able to see it (I copied the config from Deploy Create-React-App on Nginx), but I still get a 404 page when I try to navigate to it. Is my nginx file just not configured right? I can't figure out what could be causing this problem.

I've tried following Deploy Create-React-App on Nginx exactly, changing things to match my own server name etc. when appropriate.

This is the section I've added to my config file:

server {
        listen 80;
        server_name xxx.net www.xxx.net;
        root /var/www/xxx.net/html/build;
        index index.html;
        location /news {
        try_files $uri /index.html;
        }
    }