If you see any additional files or folders there (for example: game.bin and/or game.cfg), please do the following:
- Close any ArcheAge instance that is currently running (close the game).
- Delete any additional folders or files (for example: game.bin and/or game.cfg) and please make sure that you don't modify or delete base.bin and base.cer.
- Re-launch ArcheAge.
This should fix the error at hand.