安装twisted 报错，哪位大神给看看
ERROR: Exception:Traceback (most recent call last):
File "C:\Users\shimeng\AppData\Local\Programs\Python\Python39\lib\site-packages\pip-20.3.3-py3.9.egg\pip\_vendor\resolvelib\resolvers.py", line 171, in _merge_into_criterion
crit = self.state.criteria
KeyError: 'twisted'
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