Place the assets folder in the parent directory of YuanShen.exe (the game executable).

Run gi-toolkit.exe from the game directory (where YuanShen.exe is located), so the working directory is the game folder and assets is its parent.

Do not put both gi-toolkit.exe and the assets folder in the same directory as YuanShen.exe, otherwise the game may trigger a file scan and cause issues.

For example, if your game is installed at D:\Program Files\Genshin Impact\Genshin Impact Game\YuanShen.exe, then put assets in D:\Program Files\Genshin Impact\ and run gi-toolkit.exe from Genshin Impact Game.

You can use a batch script like this:

@echo off
cd "D:\Program Files\Genshin Impact\Genshin Impact Game"
..\gi-toolkit.exe

The above is just an example. The key point is: the assets folder must be in the parent directory of your working directory (the directory where you run gi-toolkit.exe).