Hello.
It seems that the server has every session type disabled and this causes the connection problems. Please edit the server configuration file:
/usr/NX/etc/server.cfg
and make sure that key
AvailableSessionTypes
is uncommented and it includes both nxvfb and physical-desktop entries.
For example working key for free version should look like this:
AvailableSessionTypes nxvfb,physical-desktop
If modification is required, please restart nxserver (as administrator user)
/etc/NX/nxserver –restart
and try connecting again.
If this does not help, please enable debug and submit logs.
Instructions are available here: https://www.nomachine.com/DT07M00098
Please include the configuration files:
/usr/NX/etc/server.cfg
/usr/NX/etc/node.cfg
Send them on to forum[at]nomachine[dot]com making sure to reference your topic.