Errfix3dsx
Because Errfix3dsx is a homebrew tool, it cannot be downloaded from the official Nintendo eShop. To use it, your console must have installed, typically through the Luma3DS environment. You will also need: An SD card with at least 50MB of free space. The .3dsx or .cia version of the Errfix3dsx file. The physical game cartridge that is experiencing issues. How to Use Errfix3dsx to Fix Your Games
Repairs the small portion of data on the cartridge that tells the 3DS what the game is and how to boot it. errfix3dsx
Troubleshooting and Repairing 3DS Game Cartridges with Errfix3dsx Because Errfix3dsx is a homebrew tool, it cannot
Exit the application and try launching the game from the standard 3DS Home Menu. When Errfix3dsx Can't Help Because Errfix3dsx is a homebrew tool