In my Network Settings GUI, when I try to toggle the VPN to "on", it briefly switches to the on position then immediately goes to off. In other words, it won't let me turn the VPN on.
I had this issue in Ubuntu 18.04 and resolved it by navigating to the identity tab of the vpn settings, clicking on the password settings and changing the setting from "Store the password only for this user" to "Store the password for all users".
I also had the same issue once I installed the network-manager for openvpn-gnome. The issue was resolved after I restarted the computer.
I had Ubuntu 18.04 installed in my laptop.
I had this issue in Ubuntu 18.04 and resolved it by navigating to the identity tab of the vpn settings, clicking on the password settings and changing the setting from "Store the password only for this user" to "Store the password for all users".
I also had the same issue once I installed the network-manager for openvpn-gnome. The issue was resolved after I restarted the computer. I had Ubuntu 18.04 installed in my laptop.