One of our users is attempting to connect to NoMachine server, version 7.9.2-3. The initial connection succeeds and, after logging in via the Ubuntu login screen, the connection is abruptly terminated. Future connection attempts fail with the error “No available desktops on this server”, and the machine needs to be rebooted to recover.
If I connect to the same workstation, via NoMachine, I am not disconnected and can login normally, repeatedly.
Please find attached the client and server logs.