Linux – NGINX 404 not found, but file exists

I want to call index.html in the folder /var/www/fileUpload/html. The index.html file exists in this folder.

/router works. The same goes for uploadFiles routing. But when I open the upload path, I get a 404 error.

    server{
    listen 80;
    server_name xx.xx.xxx.xxx;

location / {
        root /var/www/kioskJPE/html;
        index index.html;
    }
    location /upload {
        root /var/www/fileUpload/html;
        index index.html;
    }
    location /uploadFiles {
        proxy_pass http://localhost:8080;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }
}

Do you have any suggestions?
Thanks!

It should be alias /var/www/fileUpload/html; Otherwise Nginx is looking for files in /var/www/fileUpload/html/upload/index.html. See this document for details.

For example:

location /upload {
    alias /var/www/fileUpload/html;
}