This often means the game is missing data files. Ensure you have properly installed any supplementary game data files required by the specific port you downloaded.
If you prefer to play on a PC or an Android device, you can use the . omori 3ds cia install
is a psychological horror RPG originally released for PC, PlayStation, Xbox, and Switch. It was not officially released for the Nintendo 3DS. Any .cia file claiming to be OMORI is either: This often means the game is missing data files