From this:
NX> 161 Enabled service: nxserver.
NX> 162 WARNING: Cannot find X servers running on this machine.
NX> 162 WARNING: Connections to the physical display are not possible.
NX> 161 Enabled service: nxd.
it’s telling us that nxserver was not able to find or access the local X server, and make it available.
If there is a working X server, then please enable logs in server and node configuration file, restart nxserver, check the
status once again after few seconds and send to us whole var/log directory.
Additional output of the command: ps awwxo ‘ppid,pid,comm,args’ would be helpful.
The logs can be sent to issues[at]nomachine[dot]com.