TypeError: 'NoneType' object is not callable

When I use this code, I encounter an error that I can't resolve.
metric = evaluate.load(
"squad_v2" if data_args.version_2_with_negative else "squad", cache_dir=model_args.cache_dir
)

File "../../pytorch/question-answering/run_qa.py", line 712, in
main()
File "../../pytorch/question-answering/run_qa.py", line 626, in main
metric = evaluate.load(
File "/opt/conda/lib/python3.8/site-packages/evaluate/loading.py", line 706, in load
evaluation_instance = evaluation_cls(
TypeError: 'NoneType' object is not callable

evaluate is 0.4.3
transformer is 4.46.1
datasets is 2.16.0