OpenVPN Support Forum

Spent a lot of time to set it up to work with TAP, my steps:

• Turn on developer mode (hold down Esc + F3, restart, hit Control+D).
• Open a terminal (Ctrl+Alt+T, type ‘shell’, hit enter). In my case Ctrl + Alt + F2
• sudo vim /etc/resolv.conf; add “nameserver 10.10.0.1” (replacing “10.10.0.1” with the right IP) at the top
• openvpn --mktun --dev tap0
• openvpn --config /user/vpn/openvpn.ovpn --dev tap0
• When you’re done with the VPN, switch back to this tab and hit Ctrl+C
• openvpn --rmtun --dev tap0

You can also try this article https://blog.ikeran.org/?p=123
Hope this will save your time while set up.