The project needs to use anyconnect. Windows uses the client of anyconnect. Ubuntu uses openconnect instead.
apt-get install -y network-manager-openconnect-gnome
On the Ubuntu GUI, click the network icon at the top right corner to add a VPN.
The terminal requires additional installation:
apt-get install vpnc
openconnect --script /etc/vpnc/vpnc-script -b -u your_username your_vpn_url
Then enter the password to connect successfully