Why does my equipment glitch?

I am trying to go through the levels, but for some reason my hero gets glitched and when I equip my items it doesn’t seem to equip, what’s going on? How do I fix this

I also have this problem; I think its for everybody, you just had to unequip whatever item is in the slot you want to use and then equip that item.

it does the same thing for me… the equipment just dissapears.

Same issue. following.