How to solve the error: Unable to config

[dev]

If you want to use OOG in launcher auth mode and you have experience with "Unable to config" error while saving the configuration file with HOOK option checked. Here are workaround to solve the issue : 1. Update your game client to latest version 2. Go to your game client installation folder 3. Find the L2-BKK.bin then delete it. (The file was hidden) 4. Try to save again.