Not possible use vpn connection

[BlAd373]

someone knows how to fix it on kali 2018.2 vpn
I installed
network-manager-openvpn-gnome network-manager-pptp network-manager-pptp-gnome network-manager-strongswan network-manager-vpnc network-manager-vpnc-gnome
but when I go to try to connect to the vpn nothing I can not insert it and I can not even via terminal

Linux kali 4.15.0-kali2-amd64 #1 SMP Debian 4.15.11-1kali1 (2018-03-21) x86_64 GNU/Linux

Please sugestions