Traceback (most recent call last):


 "/usr/bin/dephell", line 11, in <module>

load_entry_point('dephell==0.8.3', 'console_scripts', 'dephell')()


 "/usr/lib/python3.8/site-packages/dephell/cli.py", line 84, in entrypoint

exit(main(argv[1:]))


 "/usr/lib/python3.8/site-packages/dephell/cli.py", line 44, in main

parser._print_message(parser.format_help(command=command))


 "/usr/lib/python3.8/site-packages/dephell_argparse/_parser.py", line 163, in format_help

self._format_commands(formatter=formatter, command=command)


 "/usr/lib/python3.8/site-packages/dephell_argparse/_parser.py", line 183, in _format_commands

elif command.guesses:


 "/usr/lib/python3.8/site-packages/dephell_argparse/_cached_property.py", line 18, in __get__

value = obj.__dict__[self.func.__name__] = self.func(obj)


 "/usr/lib/python3.8/site-packages/dephell_argparse/_command.py", line 85, in guesses

for name in self.argv[:2]:


 "/usr/lib/python3.8/site-packages/dephell_argparse/_command.py", line 29, in argv

return self._argv[self.words:]


 "/usr/lib/python3.8/site-packages/dephell_argparse/_cached_property.py", line 18, in __get__

value = obj.__dict__[self.func.__name__] = self.func(obj)


 "/usr/lib/python3.8/site-packages/dephell_argparse/_command.py", line 25, in words

return len(self.match.split())
AttributeError: 'NoneType' object has no attribute 'split'

Traceback (most recent call last):


 "trainer.py", line 64, in <module>

train_domain_policy(story_train_file, "models/default/dialogue")


 "trainer.py", line 46, in train_domain_policy

augmentation_factor=0


 "rasa_core/rasa_core/agent.py", line 472, in load_data

debug_plots)


 "rasa_core/rasa_core/training/__init__.py", line 57, in load_data

return g.generate()


 "rasa_core/rasa_core/training/generator.py", line 283, in generate

trackers = self._process_step(step, incoming_trackers)


 "rasa_core/rasa_core/training/generator.py", line 466, in _process_step

tracker.update(event)


 "rasa_core/rasa_core/training/generator.py", line 137, in update

self._append_current_state()


 "rasa_core/rasa_core/training/generator.py", line 107, in _append_current_state

self._states.append(frozenset(state.items()))
AttributeError: 'NoneType' object has no attribute 'append'
