I haven't tried this game, so I can only give general advice and answer some general questions.
I don't know what you've done or haven't done. If you've already ReiFucked your game, it's probably too late, restoring the game to its original state is hard.
And anyone who recommends ReiPatcher as the first thing should be put in jail, because it's trash.
If you have a clean build, download BepInEx (you must have the correct version of Mono or il2cpp, check the game files), extract to the game folder (all files must be where exe is located (BepInEx, winhttp.dll etc...), run it once, then close the game, BepInEx should create the necessary folders. Then you can insert the plugins you need..in this case auto-translator, into which you can then insert the posted translation or leave it empty and the auto-translator will generate online MTL in real time..In the case of other games, you can insert other plugins (cheats, uncensors, free cam etc..) ReiPatcher translation works the same, but Reipatcher is a parasite that overwrites game files, which can sometimes be dangerous and cause problems. In addition, it is only for Mono games and other combinations cannot be used..BepInEx should always be the first choice for Unity games.
EDIT: XUAT - XUnity.AutoTranslator..so you need correct BepInEx version + correct XUAT plugin, start, close, you will see new folders created inside BepInEx..
And trust me, it's not complicated once you learn the basics..You'll make a "fishing rod" and "catch" all Unity games.

It's just people giving you bad advices or constantly ReiFucking games and then not knowing what to do if it crashes.