“A configuration error occurred. Verify your settings”
Several retries later, I was positive it wasn't the VPN server itself that was the problem.
Although I had to leave the error at that for the time-being, come evening when I got back home, I stumbled upon this link. Bottom line, if you ever see this error on OSX, you may want to try to restart the racoon service using something to the effect of:
sudo service com.apple.racoon stop
sudo service com.apple.racoon start
Note that the OSX recommends you to use launchctl instead of service, so that would mean you do this:
sudo launchctl stop com.apple.racoon
sudo launchctl start com.apple.racoon
That did the trick for me. Hope it does for you.
-- Sifar