If the image encoder is located in a folder inside subfolder,
you only need to pass the name of the folder that contains image encoder weights, e.g. image_encoder_folder="image_encoder".
If the image encoder is located in a folder other than subfolder, you should pass the path to the folder that contains image encoder weights,
for example, image_encoder_folder="different_subfolder/image_encoder".   cache_dir (Union[str, os.PathLike], optional) 