Okay, I removed everything from the portraits folder and reloaded the save. I waited about 5 minutes this time since I do have a large save file. These are the folders that I have in portraits now so it looks the same as what you have. But unfortunately I'm still seeing the issue and not able to load this particular file.
Yeah, this looks good. There are 3 images inside each folder, right?
Now don't clear this folder, but try adding "version":"Beta #11", in the beginning of your save file https://file.coffee/ZNr11l3dF.json
If it fails once, try again. If that doesn't help, please upload your log files
C:\Users\*username*\AppData\LocalLow\Glitch Pitch\Idol Manager\Player.log
C:\Users\*username*\AppData\LocalLow\Glitch Pitch\Idol Manager\Player-prev.log