conda env list 命令报错

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请问如何解决？

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(base) C:\Users\Administrator>conda env list
Traceback (most recent call last):
  File "D:\Anaconda3\Scripts\conda-env-script.py", line 5, in <module>
    from conda_env.cli.main import main
  File "D:\Anaconda3\lib\site-packages\conda_env\cli\main.py", line 42, in <module>
    from . import main_create
  File "D:\Anaconda3\lib\site-packages\conda_env\cli\main_create.py", line 20, in <module>
    from .. import specs
  File "D:\Anaconda3\lib\site-packages\conda_env\specs\__init__.py", line 14, in <module>
    from .notebook import NotebookSpec
  File "D:\Anaconda3\lib\site-packages\conda_env\specs\notebook.py", line 4, in <module>
    import nbformat
  File "D:\Anaconda3\lib\site-packages\nbformat\__init__.py", line 12, in <module>
    from ._version import __version__, version_info
  File "D:\Anaconda3\lib\site-packages\nbformat\_version.py", line 28, in <module>
    _version_fields = _version_regex.match(__version__).groupdict()  # type:ignore
TypeError: expected string or bytes-like object

(base) C:\Users\Administrator>