brushMechanic

hello i am trying to do the mechanics in the video ( How it's Made: Rover Mechanic Simulator | Cleaning Minigame - How to Paint a Texture Unity Tutorial - YouTube )
everyone wrote great, working, etc. in the comments of the video, but it doesn’t work for me at all.
can you tell me what the problem is

unity package ( file contains scene )
https://firebasestorage.googleapis.com/v0/b/intagram-af98c.appspot.com/o/BrushSample.unitypackage?alt=media&token=c37416d5-02df-4622-9df8-2e1da40960b4

If you don’t specify exactly what doesn’t work it’s hard for anyone to help you.

You can’t capture input? You can’t calculate the position on the texture? You can’t draw on the texture? The texture doesn’t update?