echo 'Encryption=PreferOn' | sudo tee -a /root/.vnc/config.d/vncserver-x11
sudo vncpasswd -legacy -service
sudo systemctl restart vncserver-x11-serviced
My Own Little Piece of the Web
echo 'Encryption=PreferOn' | sudo tee -a /root/.vnc/config.d/vncserver-x11
sudo vncpasswd -legacy -service
sudo systemctl restart vncserver-x11-serviced