Site doesn't work at non-root URL

[brownksc]

Mediatracker is working fine if I set up a reverse proxy in nginx to host it at the root directory (e.g., example.com) but not if I try to host it at a different directory (e.g., example.com/mediatracker).

This nginx config works as expected:

location / {
            proxy_pass http://127.0.0.1:7481;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
        }

This one does not:

location /mediatracker/ {
            proxy_pass http://127.0.0.1:7481/;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
        }

I tried this same config but with an Apache container (https://hub.docker.com/_/httpd):

docker run -dit --name my-apache-app -p 7481:80 -v "$PWD":/usr/local/apache2/htdocs/ httpd:2.4

And I'm able to access the Apache container's website with both nginx configs shown above. For some reason though, with mediatracker, only the first config works.

Any ideas?

Update: Just tried configuring a reverse proxy in Apache instead of NGINX. Same exact result, with root URL working fine and then mediatracker failing to display if I set it to some other URL. (/test/ for example).

Mediatracker will display a blank white page with the <title> tag set to 'Media Tracker' when this error occurs.