The decryption key is not a password you can type in; rather, it is a hexadecimal string embedded in the game’s executable or dynamically generated via API calls to EA’s servers when the game launches in online mode.
FIFA 23 uses the EA Anti-Cheat system, which can conflict with deep file modifications. Make sure to launch your compiled mods through the companion FIFA 23 Mod Manager rather than launching straight from your retail desktop shortcut. fifa editor tool encryption key fifa 23 verified