[NEED HELP] @inventaire/client/main.lua:244: bad argument #1 to 'for iterator' (table expected, got nil)

Hi, I am struggling with adding an inventory, I keep getting errors. Now I am stuck with this error and I could not figure it out by myself:/ The script I am using is
inventoryV22.zip (16.5 MB)

Here is a picture of the error I am getting.