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people on 1.20.1!! its probably not working for you. sry about that. HOWEVER if ur downloading it solely for visual effects then theres 2 mods called "entity model features" and "entity model textures" and i didnt need optifine at all for my better animations resource pack :P
i have tried it, for older versions it doesn't crash, for some newer ones though, it does. i am a bit unsure why it does it, may be able to help if i find it out