I am currently working on setting up NoMachine via a Headless server.

Setup: Client (openBSD) > Headless Nomachine Server (UNIX) > Terminal Server (Windows)

I am able to login to NoMachine Server via Web but unable to launch Remote Desktop with error: Session Negotiation Failed. Cannot connect to requested session ID.

Also, I am getting below error message when trying to run rdesktop inside the NoMachine server.

Error: Autoselecting keyboard map 'en-us' from locale UI(error): ui_init(), failed to open X11 display:

The X11Forwarding is already enabled. Does any of you have any idea on how to troubleshoot or fix this issue?