I'm having a problem with the tool swapper upgrade (advanced too), for some reason it won't work when I try using it. I know that you have to put the tools in the backpack for it to work so I don't know why it doesn't work. I thought it was because it wasn't compatible with the modpack I was using, but I installed it without any other mods and it still won't work. Did I do something wrong or missed a step any help would be appreciated. Also the version I'm using is 1.20.1.

Are you holding and trying to use some tool in your hand or have a weapon in your hand? It swaps tools / weapons so if you're trying this with nothing in your hand or an item that's not a tool or weapon it won't do anything.