Django tutorial: `python manage.py startapp polls` fails

From here, everything was successful until I got to this section.

The traceback is:
Traceback (most recent call last):

File “manage.py”, line 22, in
main()
File “manage.py”, line 18, in main
execute_from_command_line(sys.argv)
File “/Users/bobrien/.pyenv/versions/django-realpython.com/lib/python3.8/site-packages/django/core/management/init.py”, line 401, in execute_from_command_line
utility.execute()
File “/Users/bobrien/.pyenv/versions/django-realpython.com/lib/python3.8/site-packages/django/core/management/init.py”, line 395, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File “/Users/bobrien/.pyenv/versions/django-realpython.com/lib/python3.8/site-packages/django/core/management/base.py”, line 341, in run_from_argv
connections.close_all()
File “/Users/bobrien/.pyenv/versions/django-realpython.com/lib/python3.8/site-packages/django/db/utils.py”, line 230, in close_all
connection.close()
File “/Users/bobrien/.pyenv/versions/django-realpython.com/lib/python3.8/site-packages/django/utils/asyncio.py”, line 26, in inner
return func(*args, **kwargs)
File “/Users/bobrien/.pyenv/versions/django-realpython.com/lib/python3.8/site-packages/django/db/backends/sqlite3/base.py”, line 261, in close
if not self.is_in_memory_db():
File “/Users/bobrien/.pyenv/versions/django-realpython.com/lib/python3.8/site-packages/django/db/backends/sqlite3/base.py”, line 380, in is_in_memory_db
return self.creation.is_in_memory_db(self.settings_dict[‘NAME’])
File “/Users/bobrien/.pyenv/versions/django-realpython.com/lib/python3.8/site-packages/django/db/backends/sqlite3/creation.py”, line 12, in is_in_memory_db
return database_name == ‘:memory:’ or ‘mode=memory’ in database_name
TypeError: argument of type ‘PosixPath’ is not iterable