This link doesn't seem right. Have you changed the address? https://github.com/huggingface/diffusers/raw/main/examples/unconditional_image_generation/train_unconditional.py Is this link the same as the one above? "https://github.com/huggingface/diffusers/blob/main/examples/unconditional_image_generation/train_unconditional.py" If yes, do you know what the error is and how to solve it? 