I recently hopped on minecraft after a good few months, and it was updating to the latest version. When I hopped onto my worlds, villagers' heads were invisible, zombies, other players, golems, and I'm sure other mobs are too (I just can't name them all) as well as myself were all invisible on my screen. I tried joining my brother's world to see if he can see me, he can but I cannot see myself or him. Even in the homepage or menu page, I can't see my character on the side where it allows me to change skins.