Unicode characters, trailing spaces, or illegal characters (like ? , * , or / ) in the filename can cause the file system to return a "file not found" even though the file visually appears.
The game may be relying on standard assets that aren't installed on your system or weren't included in the game's local files. File Path Mismatch:
(if using RPG Maker) to see if the file is imported. If it's a standard RTP (Run-Time Package) asset you're missing, you may need to reinstall the engine's base assets. Use a Replacement
To recap:
If you are playing a specific localized mod (translation patch), the patch itself may be broken. Try finding the "Original" English version of the game to see if the audio works there.
If you do not want to install the full RTP, you can manually trick the game into working by providing it with any compatible file:
She imagined the man, sitting back in his chair somewhere beyond the city, imagining a box of tapes and a future that might care for them. She hoped, quietly, that he would be surprised to learn that his memory had been rescued from an indifferent filename and given a life that matched its care.