try in this way:
$ pkill vino $ export DISPLAY=:0.0 $ /usr/lib/vino/vino-server & $ gsettings set org.gnome.Vino require-encryption false
VNCclient you have to choose encryption off
try in this way:
$ pkill vino vino/vino- server &
$ export DISPLAY=:0.0
$ /usr/lib/
$ gsettings set org.gnome.Vino require-encryption false
VNCclient you have to choose encryption off