I was having the same problem ("If you use one of --cert or --key, you must use them both" in syslog). Upgrading to 1.8.0-3 fixed the issue for me.
As a minor caveat, simply pointing to the private key file in the UI was not enough and I was getting: nm-openvpn[5972]: OpenSSL: error:0B080074:x509 certificate routines:X509_check_private_key:key values mismatch nm-openvpn[5972]: Cannot load private key file /home/tsniatowski/.cert/nm-openvpn/vpn-key.pem Possibly something else needed tweaking, I fixed this by re-importing the .openvpn file I got and then the connection worked. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1754172 Title: NetworkManager breaks OpenVPN configuration on connection To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager-openvpn/+bug/1754172/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs