Ok, so let me start my sad story. I was making a resource pack. A GOOD ONE! It was so succulent. But then there was a problem. a big problem. It is a problem with the best texture of all time, the *drumroll*GREY WOOL!*CRASH*
I made the grey wool texture, and put it in the proper place. As you can see from the picture. However, when I go in-game, I get a "missing texture" for the grey wool and the grey wool carpet.
None of your textures seem to be animated, so I can only assume that your grey wool texture isn't a perfect square. If it isn't a perfect square, the game thinks it's an animation, and looks for an mcmeta file, which you don't have. If it can't find one, or the file has an error, the pink and black squares show up.