AttributeError: 'list' object has no attribute '__module__' when calling from_pretrained using file system

Discussed in https://github.com/huggingface/diffusers/discussions/7610

^{Originally posted by dferguson992 April 8, 2024}
I downloaded the stabilityai/stable-cascade model from HuggingFace and saved it to my file system using the following:

model = StableCascadeCombinedPipeline.from_pretrained(HF_MODEL_ID, 
                                                      variant="bf16",
                                                      torch_dtype=torch.float16)
model_path = "model/"
code_path = "code/"

if not os.path.exists(model_path):
    os.mkdir(model_path)
if not os.path.exists(code_path):
    os.mkdir(code_path)

model.save_pretrained(save_directory=model_path)

My plan is to deploy this to a SageMaker endpoint but am having trouble re-loading the model from the local file system. I keep getting the following error when I call model = StableCascadeCombinedPipeline.from_pretrained("model/", variant="bf16", torch_dtype=torch.float16):

Been at this for several days now, not sure what I'm doing wrong.