File corruption, incorrect naming, or the wrong slot range.
Use the "download save" icon (an arrow pointing down) in the YNOProject interface to save a physical copy to your computer. Save File Editing and Recovery Yume 2kki Save File
In a game where exploration is everything and progress is measured by the discovery of "Effects" (abilities) and the unlocking of new areas, the save file is more than just a digital record—it is a sacred artifact. It represents your personal map through the collective unconscious of hundreds of developers. File corruption, incorrect naming, or the wrong slot range
When a new version of Yume 2kki is released, you don't have to start over. Follow these steps to migrate your data: Yume 2kki Save File