save_model.py 'ViTImageProcessor' object has no attribute 'framework'

[dykim723]

Traceback (most recent call last):
File "/Users/user/Workspace/pneumonia-detection-demo/Pneumonia-Detection-Demo/save_model.py", line 60, in
raise SystemExit(download_model())
File "/Users/user/Workspace/pneumonia-detection-demo/Pneumonia-Detection-Demo/save_model.py", line 54, in download_model
bentoml.transformers.save_model("vit-extractor-pneumonia", extractor),
File "/Users/user/opt/anaconda3/envs/test/lib/python3.10/site-packages/bentoml/_internal/frameworks/transformers.py", line 816, in save_model
"_framework": pretrained.framework,
AttributeError: 'ViTImageProcessor' object has no attribute 'framework'

can you help me?