error: Username is empty!

You need to check "Save username and password", otherwise it’ll simply not work.

info: [openvpn] Options error: Unrecognized option or missing parametr(s) in /home/user/.kde/share/apps/kvpnc/openvpn.thingy.conf:8 cd (2.0.7)

You need to fill out the certificate path in the profile options, if it’s empty it’ll just put "cd <nothing" instead of omitting the command. 

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