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ERROR: test_values (tests.test_csv_iterable_dataset.TestCSVIterableDataset)
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Traceback (most recent call last):
  File "/__w/MONAI/MONAI/tests/test_csv_iterable_dataset.py", line 202, in test_values
    for item in dataloader:
  File "/opt/conda/lib/python3.8/site-packages/torch/utils/data/dataloader.py", line 442, in __iter__
    return self._get_iterator()
  File "/opt/conda/lib/python3.8/site-packages/torch/utils/data/dataloader.py", line 388, in _get_iterator
    return _MultiProcessingDataLoaderIter(self)
  File "/opt/conda/lib/python3.8/site-packages/torch/utils/data/dataloader.py", line 1043, in __init__
    w.start()
  File "/opt/conda/lib/python3.8/multiprocessing/process.py", line 121, in start
    self._popen = self._Popen(self)
  File "/opt/conda/lib/python3.8/multiprocessing/context.py", line 224, in _Popen
    return _default_context.get_context().Process._Popen(process_obj)
  File "/opt/conda/lib/python3.8/multiprocessing/context.py", line 291, in _Popen
    return Popen(process_obj)
  File "/opt/conda/lib/python3.8/multiprocessing/popen_forkserver.py", line 35, in __init__
    super().__init__(process_obj)
  File "/opt/conda/lib/python3.8/multiprocessing/popen_fork.py", line 19, in __init__
    self._launch(process_obj)
  File "/opt/conda/lib/python3.8/multiprocessing/popen_forkserver.py", line 47, in _launch
    reduction.dump(process_obj, buf)
  File "/opt/conda/lib/python3.8/multiprocessing/reduction.py", line 60, in dump
    ForkingPickler(file, protocol).dump(obj)
AttributeError: Can't pickle local object '_make_date_converter.<locals>.converter'