Remote Desktop usually was a breeze on Ubuntu but this time, for some reason, it refused to work. The alternate is simple, use another VNC server.
Set a password for incoming vnc connections
at this point you are good to go, issue the following command and it’ll come to life, but it’s best to add x11vnc to startup so that you don’t have to start it everytime the server reboots.
Add the following lines to the file: /etc/init/x11vnc.conf
Reboot and try connecting to the server using a VNC client, I use VNC viewer