Unable to create VPN connection in Ubuntu 16.04?

Question

Unable to create VPN connection as the Save button is always disabled.

Also, the Add VPN Connection... option under VPN Connections is disabled.

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As per this solution, I tried accessing the nm-connection-editor from the terminal but the problem remained the same. Running the following:

$ sudo nm-connection-editor

Gave me the following error in the terminal:

** Message: vpn: (openvpn,/usr/lib/NetworkManager/VPN/nm-openvpn-service.name) file "/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-vpn-plugin-openvpn.so" not found. Did you install the client package?
Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
** Message: Cannot save connection due to error: Editor initializing...
** Message: Cannot save connection due to error: Invalid setting VPN: IPSec gateway

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I checked org.freedesktop.NetworkManager.policy file as per this solution but the allow_inactive was already set to yes.

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How can I resolve this issue? Is there any other way to connect to VPN?

Solution

I had a similar problem. There was also no /usr/lib/x86_64-linux-gnu/NetworkManager/libnm-vpn-plugin-openvpn.so file.

The installation of the network-manager-openvpn-gnome package helped.