Hi Players of Dragon Nest SEA, and I got this error also, I already tried Auto Patched, Manual Patched, reinstalled game, redownloaded game and reinstalled with different directory. and I also tried off my firewall and change DNS server but still its not working.
But finally I got sulotion on how to fixed this problem. Fixed it by opening up Internet Explorer. For some reason, Internet Explorer wasn’t connected to the internet, even though all of your other programs were.
A box popped out asking to to “Connect” or “Work Offline.”
Clicked on “Connect” and Internet Explorer was now online.
And now try open your “Dragon Nest launcher” then 100% it worked. For some reason this game wants IE to be in working condition.
_________________Keep GAME ON GUYS, DRAGON NEST SEA INDO FORUM