Troubles

I've returned after big pause and have some questions:
1. Textures. Found epic horns in spirit crate - horns have no texture. Any new cosmetic skin have no textute - only P in red square - .
2. Emerald pouch - how can i get this thing.
3. How to upgrade resourcepack - have only old version (23 Dec, 2020)

 

i'd assume the texture problem is because of having the old resource pack, you can get the new one either by downloading it from someone else or by switching back to server resource packs to automatically download it (then once you download it you can put it in normal resource packs again if you want)

emerald pouches you can get from chests, you get 1 "free" t1 pouch from your first t3/t4 chest and beyond that it's just an item you can find in them