Fix Discord errors 2020, 2022, 2023, 2024, 2025, 2029, 2051, 2058, 2059, 2064, 2065, 2069, 2070, 2072, 2073, 2074, Installation failed, etc.

Attack on Titan Revolution codes are shared on the game's official Discord server. Codes usually only stay active for a few days, so it's best to redeem codes soon after they're released.