Thanks, I will look into this and let you know as soon as I can. Can you also tell me do you have the new input system installed?
PlayerInventoryv1.1\Assets\PlayerInventorySystem\Scripts\Controller\ItemBar.cs(2,29): error CS0234:
refers to the old input system used in this case to scroll the item bar selection... I had no clue this was still in there.. I will update this asap.
And what version on Unity are you on? is this happening in one of the demo's or your own project?