404 not found. Why can't nginx see this static url?

Question

Nginx

If you go with /, and by clicking on the button, go to /managespeech, then everything works, and if you then reload the page, then this is already

user  nginx;
worker_processes  2;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}

http {
    server {
    
        root /www/data;
    
        sendfile_max_chunk 50m;
        
        try_files $uri $uri/ $uri.html =404;
    }
}

ps The code is inserted by copy-paste from the docks

Answer 1

Well, compare in the console what happens when you click on the button and when you just follow the URL.