The keys.txt must be in the main Cemu folder.

If the key is correct but the game fails, the WUD or WUX file itself may be incomplete or corrupted. Try re-dumping the media from your console.

: The keys.txt file is usually located in the main Cemu directory or in %USERPROFILE%\AppData\Roaming\Cemu . Android : Place it in Android/data/info.cmu.cmu/files .

Legally, you should dump these keys from your own physical Wii U console using homebrew software like .

In recent updates, Cemu introduced a new, proprietary file format called .

This indicates that while Cemu reads your game file, the specific 32-character Title Key for that game is missing from your keys.txt file, or the Title ID does not match.

Using tools like Dumpling also allows you to legally dump your physical game discs directly into the unencrypted Loadiine or WUA formats, completely bypassing the need to hunt down individual title keys in the future. Troubleshooting Common Key Errors

Look for a file named keys.txt in the root of the Cemu folder.

Cemu automatically checks this file when you try to boot an encrypted game. Legal and Safe Acquisition

Searching for “full title keys” online leads to: