First, where does Express Invoice keep its web server logs? I'd like to see what may be going on in some certain circumstances in order to troubleshoot issue.
For example, I use Nginx Proxy Manager to encrypt HTTP traffic for various servers on my location that don't normally support HTTPS. This is nice because it uses Let's Encrypt to create SSL certs and everything works great all of the time with everything I run on it... up to now!
For some reason NCH ExpressInvoice will show the login (/logon) page just fine, but when I attempt to login with my username and password it redirects right back to `/logon`. When I visit the HTTP redirect on the same passthrough proxy it logs in and works fine. Something is happening somehow with NCH Express Invoice that's not allowing resources or login somehow and I'd like to get to the bottom of it!