I have installed the root certificate for recording HTTPS but none of the HTTPS pages in my user journey are being recorded. I don't get any errors or warnings when I access the HTTPS pages and NeoLoad appears to be able to modify the browsers proxy settings.
It looks like the browser HTTPS traffic is not going through the browser. Have you tried to record any other HTTPS web site to see if the issue is specific to your application?
What about any HTTP application? Does it work?