A "Missing config file default.cfg" error is a frequent startup crash for PC players.
If you are using a modded client or have manually moved files, the engine may lose the pointer to the default.cfg location. 3. How to Fix Missing default.cfg Errors
Have a tip or a horror story about a corrupted config? Share it in the comments below. And don’t forget to check our other BO2 guides on optimizing FPS and fixing Plutonium launcher errors.