Lichii key and firmware errors come from four causes: prod keys in the wrong folder, prod keys older than the firmware or game, a broken firmware install, and a corrupted key file. The table below matches each message to its cause and its fix.
| Error or symptom | Cause | Fix |
|---|---|---|
| Encryption keys are missing | No prod.keys in the keys folder | Encryption keys are missing in Lichii |
| Key derivation components missing | Incomplete prod.keys | Key derivation components missing |
| Game asks for newer firmware | Firmware older than the game | Game requires a newer firmware |
| Firmware installs but games fail | Keys older than firmware | Prod keys and firmware mismatch |
| Crash or black screen on launch | Keys, firmware or GPU driver | Lichii crashes when launching a game |
How do you fix an invalid or corrupted prod.keys file?
An invalid prod.keys file is fixed by replacing it with a clean copy and checking four things: the name is exactly prod.keys, the file is plain UTF-8 text, every line follows key_name = value, and its SHA-256 matches the published hash. Text editors that add a .txt extension or a byte-order mark break the file.
Why does the Lichii firmware install fail?
A firmware install fails for three reasons: prod.keys is not installed yet, the ZIP download is incomplete, or the NCA files sit inside an extra subfolder. Install keys first, compare the ZIP hash, and point From Folder at the folder that directly contains the NCA files.
What should you check before any other fix?
- Lichii is an official build from GitHub, not a mirror.
- prod.keys matches or is newer than the installed firmware.
- The firmware version is at least the version the game needs.
- Your GPU driver is current.