"Unknown option: proto udp6" error on openvpn import in KDE network manager

[linex83]

I created an openvpn config file, which I could successfully run on command line. However, as I tried importing the file with the KDE network manager, I got the following error message:

"Unknown option: proto udp6"

Since the openvpn command could process the config file without problems, I think the network manager should be able to do that, too.

Here's my openvpn client config file:
client
dev tun
proto udp6
remote aaaa:bbbb:...:ccc 7002
resolv-retry infinite
nobind
persist-key
persist-tun
ca ca.crt
cert my.crt
key my.key
remote-cert-tls server
tls-auth ta.key 1
cipher AES-256-CBC
auth SHA512
comp-lzo
verb 3
key-direction 1

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: xorg 1:7.7+16ubuntu3
ProcVersionSignature: Ubuntu 4.10.0-21.23-generic 4.10.11
Uname: Linux 4.10.0-21-generic x86_64
ApportVersion: 2.20.4-0ubuntu4.1
Architecture: amd64
CurrentDesktop: KDE
Date: Mon Jun 5 22:08:08 2017
InstallationDate: Installed on 2017-06-04 (0 days ago)
InstallationMedia: Kubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)