library doesn't work: TypeError: 'NoneType' object is not subscriptable

[dimit999]

Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.8/bin/flake8", line 11, in
load_entry_point('flake8==3.8.2', 'console_scripts', 'flake8')()
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flake8/main/cli.py", line 22, in main
app.run(argv)
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flake8/main/application.py", line 360, in run
self._run(argv)
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flake8/main/application.py", line 347, in _run
self.initialize(argv)
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flake8/main/application.py", line 329, in initialize
self.register_plugin_options()
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flake8/main/application.py", line 165, in register_plugin_options
self.check_plugins.register_options(self.option_manager)
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flake8/plugins/manager.py", line 494, in register_options
list(self.manager.map(register_and_enable))
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flake8/plugins/manager.py", line 302, in map
yield func(self.plugins[name], *args, **kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flake8/plugins/manager.py", line 490, in register_and_enable
call_register_options(plugin)
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flake8/plugins/manager.py", line 402, in generated_function
return method(optmanager, *args, **kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flake8/plugins/manager.py", line 216, in register_options
add_options(optmanager)
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flake8_filename/init.py", line 31, in add_options
parser.add_option(None, "--filename_check{}".format(num), **kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flake8/options/manager.py", line 408, in add_option
self._current_group.add_argument(*option_args, **option_kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/argparse.py", line 1354, in add_argument
kwargs = self._get_optional_kwargs(*args, **kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/argparse.py", line 1484, in _get_optional_kwargs
if not option_string[0] in self.prefix_chars:
TypeError: 'NoneType' object is not subscriptable