Fail to copy files

[nClaw]

Downloaded game from website last week, reinstalled and this still happen. Help please, i dont wanna download again.

[Knee]

Try manual patch.
Make sure you're on the correct version before patching.
https://sea.dragonnest.com/game/download

[Verbena]

Never in my life seen this error message again so I'm clueless.

Try manual patching and if it doesn't work come back here and describe in detail how you downloaded and installed the game. Your OS, antivirus, and other information that you think may be useful.