Go to C:\Users\ . Look at your folder name. If it is C:\Users\José\ or C:\Users\Sarah Connor\ , the game will never save correctly.
Even worse? You click "Yes," and the game either freezes, crashes to desktop, or fails to save entirely.
If you have a unique fix that worked for you but isn't listed here, please share it in the comments to help the rest of the Shinobi alliance.
Once you have solved the issue, create a manual backup of your working Savedata.bin to your desktop or Google Drive. This way, if the error returns after a Windows update, you can restore your progress in 30 seconds.
This error is notoriously common on , though it occasionally appears on PlayStation and Xbox. It implies that your save file is either corrupted, blocked by permissions, or that the game cannot read the directory path.
Now go forth, Seventh Hokage. The Infinite Tsukuyomi won't break itself.