OSError: Error no file named model_index.json found in directory pixelart_model

from diffusers import StableDiffusionPipeline

from diffusers import AutoPipelineForText2Image
import torch
from pathlib import Path

pipeline = AutoPipelineForText2Image.from_pretrained(str(Path("./pixelart_model")), torch_dtype=torch.float16, use_safetensors=True).to("cuda")

image = pipeline(prompt="a cat riding a sports bike with tyres on fire, pixel art style").images[0]
image.save("out.png")