Chettos

I downloaded forge for version 1.20.1 when I enter the game my skin does not load, on the contrary the one that appears is Alex's skin, in addition to this I find errors in some mods such as the Vampiris mod or the Alex`s caves when these mods add armor, these do not come out with texture, their textures are corrupted and do not load and this only happens with armor, I don't know what happens, I NEED HELP