Can't start openvpn connection from command line

Hi

I can connect to a VPN using the Openvpn client in the GUI with a .ovpn file from my provider.

But when I try to start the same connection from the command line (I want to create a script with VPN) I get an error:

Fri Oct 2 20:11:56 2015 ERROR: Cannot open TUN/TAP dev /dev/net/tun: No such device (errno=19)

The router can create tun devices OK when launched from the GUI e.g.:
17: tun12: <POINTOPOINT,MULTICAST,NOARP,UP,10000> mtu 1500 qdisc pfifo_fast qlen 100

I had a look online and...

Can't start openvpn connection from command line