Behind a Reverse Proxy (NginxProxyManager)

[danmed]

I'm having issues getting this running behind NginxProxyManager..

I have it set up with SSL to link.domain.co.uk

if i visit that URL then i get nothing.. however if i append /login to the end i get the login page.. but when i log in i then get a "Not Found" page..

I know it's something stupid i'm missing but any guidance would be appreciated!