Ok so I have a few.. problems with this pack.
1. Animations are awesome but too slow. maybe have a way so not have to do it each time they spawn.
2. few missing textures.

bonnie's nose on prop
chica's eyebrows

the textures are missing on BB`s balloon but nothing else

All textures all mising (material pack is installed)

Restart your game

Whenever you enter Stage 2 with Mangle, the gift always switches to the red one

Stage 1 BB balloon is missing textures

wires on phantom bonnie are errors, installed mats
still errors, reinstalled mats, still errors

My endoskeleton of freddy,bonnie and foxy is not working for me. help me pls.

i don't know if i haven't installed the texture pack but the textures are missing can you post the Texture pack EDIT: just found the texture pack LOL

Stage 3 for Springtrap is not working and when I press r it says something is creating errors.

Can you check your console and show what the error says? It'd give me a very good hint at what's going on

i can't go into stage 3 with springtrap

I'd like to get the error log nonetheless. I could attempt to fix it

Here is what it says:

File exists in two addons - possible conflicts! lua/entities/pill_ent_costume.lua (Morph Mod With Fixes and Fazbear's Ultimate Pill Pack Remaster 3: Reborn)

[ERROR] lua/autorun/include/pill_fnaff3.lua:377: attempt to compare nil with number
1. reload - lua/autorun/include/pill_fnaff3.lua:377
2. DoKeyPress - lua/entities/pill_ent_costume.lua:735
3. v - lua/includes/modules/pk_pills.lua:998
4. unknown - lua/includes/modules/hook.lua:84

Yeah Morph Mod with Fixes causes the issue, clear your gmas through the console. ( menu_cleanupgmas )