If you are still seeing the error after updating your keys, the SwitchPirates Wiki on Rentry is a highly regarded resource for the most up-to-date setup guides.
The story doesn't end in 2021. The relationship between SAK, keys, and the console is a constant cat-and-mouse game.
Paste your key file directly into this bin directory. Ensure the file name is precisely lowercase prod.keys . 2. Update the SAK Backend (hactoolnet) sak are the keysdat prodkeys correct 2021
Sometimes, the file you have is simply outdated or incomplete. The Nintendo Switch firmware is updated regularly, and new games often require new keys that were not present in older key files.
Any game, update, or DLC released after that window requires newer encryption keys. Trying to load a 2023 or 2026 game with 2021 keys will result in a "Missing derive keys", "Key derivation failed", or black screen error. If you are still seeing the error after
Setting up a Nintendo Switch emulator like Yuzu or Ryujinx requires specific cryptographic files. You have likely encountered terms like and prod.keys .
If you are still getting errors, check the file properties of the .nsz or .nsp files you are trying to convert. Ensure that the "Read Only" box is in the file's Properties in Windows. Conclusion Paste your key file directly into this bin directory
If you used keys from 2020, newer games simply wouldn't boot.
To legally obtain the correct, up-to-date keys, use a homebrew tool like Lockpick_RCM on your custom-firmware-enabled Nintendo Switch console. This extracts the newest keys directly from your console’s hardware memory after you install the latest system update.