How do I solve transparent colored box on 2d sprites?

I finished drawing a prototype of the player and I sliced it in the unity editor, but I saw that the sprites had coloured transparent boxes on them. I don’t if I missed anything or if this is a common problem.
Does anyone know how to solve this?

NVM. I just solved it. For anyone with this problem, it’s just a very simple fixed. You just have to select “no compression” in the compression section below.