cv2.error: OpenCV(4.10.0) :-1: error: (-5:Bad argument) in function 'cvtColor'

My environment:
PyTorch: 2.8.0
Python: 3.12(ubuntu22.04)
CUDA: 12.8

I run the gradio_demo.py, upload the imgs/demo_image.jpg and uncheck 'Use PaddleOCR', then submit it, finally, following error in the terminal:

Traceback (most recent call last):
File "/root/miniconda3/lib/python3.12/site-packages/gradio/queueing.py", line 625, in process_events
response = await route_utils.call_process_api(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/root/miniconda3/lib/python3.12/site-packages/gradio/route_utils.py", line 322, in call_process_api
output = await app.get_blocks().process_api(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/root/miniconda3/lib/python3.12/site-packages/gradio/blocks.py", line 2044, in process_api
result = await self.call_function(
^^^^^^^^^^^^^^^^^^^^^^^^^
File "/root/miniconda3/lib/python3.12/site-packages/gradio/blocks.py", line 1591, in call_function
prediction = await anyio.to_thread.run_sync( # type: ignore
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/root/miniconda3/lib/python3.12/site-packages/anyio/to_thread.py", line 33, in run_sync
return await get_asynclib().run_sync_in_worker_thread(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/root/miniconda3/lib/python3.12/site-packages/anyio/_backends/_asyncio.py", line 877, in run_sync_in_worker_thread
return await future
^^^^^^^^^^^^
File "/root/miniconda3/lib/python3.12/site-packages/anyio/_backends/_asyncio.py", line 807, in run
result = context.run(func, *args)
^^^^^^^^^^^^^^^^^^^^^^^^
File "/root/miniconda3/lib/python3.12/site-packages/gradio/utils.py", line 883, in wrapper
response = f(*args, **kwargs)
^^^^^^^^^^^^^^^^^^
File "/root/autodl-tmp/OmniParser/gradio_demo.py", line 52, in process
ocr_bbox_rslt, is_goal_filtered = check_ocr_box(image_input, display_img = False, output_bb_format='xyxy', goal_filtering=None, easyocr_args={'paragraph': False, 'text_threshold':0.9}, use_paddleocr=use_paddleocr)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/root/autodl-tmp/OmniParser/util/utils.py", line 523, in check_ocr_box
result = reader.readtext(image_np, **easyocr_args)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/root/miniconda3/lib/python3.12/site-packages/easyocr/easyocr.py", line 454, in readtext
img, img_cv_grey = reformat_input(image)
^^^^^^^^^^^^^^^^^^^^^
File "/root/miniconda3/lib/python3.12/site-packages/easyocr/utils.py", line 757, in reformat_input
img_cv_grey = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
cv2.error: OpenCV(4.10.0) 👎 error: (-5:Bad argument) in function 'cvtColor'
Overload resolution failed:

• src is not a numpy array, neither a scalar
• Expected Ptrcv::UMat for argument 'src'

Reproduce the failure with gradio_demo.py using imgs/demo_image.jpg and with “Use PaddleOCR” unchecked. Start at gradio_demo.py line 52 and util/utils.py line 523, then inspect the image passed to EasyOCR before cv2.cvtColor runs. Done means the demo processes the uploaded image without the cv2.error.