In short, errfix is a for the 3DS. Its main feature is restoring the integrity of the system's error display module , which is often broken during failed region swaps or corrupt system modifications, preventing the console from soft-bricking on generic errors.

Open your emulator and before starting the game.

Place the file in the specific textures or game folder (e.g., Emulation/texturepacks/azahar/textures ).

: The "missing faces" bug is often caused by a lack of dumped system files (Mii data). You may need to dump the extdata from a physical 3DS console and place it in your emulator's user folder.

Open your emulator and "Run" or "Load" the errfix.3dsx file as if it were a game. Run: The app will execute its fix script automatically.

If you prefer not to use a third-party utility, you can also fix the issue by: