how to load model from local disk

i download model from huggingface, and change model path as like:
` processor = AutoProcessor.from_pretrained("/home/ds4sd/SmolDocling-256M-preview")
model = AutoModelForVision2Seq.from_pretrained(
"home/ds4sd/SmolDocling-256M-preview",
torch_dtype=torch.float32, # Using simpler dtype
).to(device)`

when i try to run, error occurs:
Error loading model: Unrecognized processing class in ds4sd/SmolDocling-256M-preview. Can't instantiate a processor, a tokenizer, an image processor or a feature extractor for this model. Make sure the repository contains the files of at least one of those processing classes.