granary valueerror.txt

>>> tw.get_activities(group_id='@friends')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.10/site-packages/granary/source.py", line 243, in get_activities
    return self.get_activities_response(*args, **kwargs)['items']
  File "/usr/local/lib/python3.10/site-packages/granary/twitter.py", line 329, in get_activities_response
    resp = self.urlopen(url, headers=headers, parse_response=False)
  File "/usr/local/lib/python3.10/site-packages/granary/twitter.py", line 1104, in urlopen
    return request()
  File "/usr/local/lib/python3.10/site-packages/granary/twitter.py", line 1095, in request
    resp = twitter_auth.signed_urlopen(
  File "/usr/local/lib/python3.10/site-packages/oauth_dropins/twitter_auth.py", line 58, in signed_urlopen
    headers.update(auth_header(url, token_key, token_secret, method=method))
  File "/usr/local/lib/python3.10/site-packages/oauth_dropins/twitter_auth.py", line 38, in auth_header
    req = requests.Request(method=method, url=url, auth=oauth1).prepare()
  File "/usr/local/lib/python3.10/site-packages/requests/models.py", line 299, in prepare
    p.prepare(
  File "/usr/local/lib/python3.10/site-packages/requests/models.py", line 372, in prepare
    self.prepare_auth(auth, url)
  File "/usr/local/lib/python3.10/site-packages/requests/models.py", line 603, in prepare_auth
    r = auth(self)
  File "/usr/local/lib/python3.10/site-packages/requests_oauthlib/oauth1_auth.py", line 108, in __call__
    r.url, headers, _ = self.client.sign(
  File "/usr/local/lib/python3.10/site-packages/oauthlib/oauth1/rfc5849/__init__.py", line 351, in sign
    ('oauth_signature', self.get_oauth_signature(request)))
  File "/usr/local/lib/python3.10/site-packages/oauthlib/oauth1/rfc5849/__init__.py", line 165, in get_oauth_signature
    uri, headers, body = self._render(request)
  File "/usr/local/lib/python3.10/site-packages/oauthlib/oauth1/rfc5849/__init__.py", line 247, in _render
    headers = parameters.prepare_headers(
  File "/usr/local/lib/python3.10/site-packages/oauthlib/oauth1/rfc5849/utils.py", line 25, in wrapper
    return target(params, *args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/oauthlib/oauth1/rfc5849/parameters.py", line 53, in prepare_headers
    escaped_value = utils.escape(value)
  File "/usr/local/lib/python3.10/site-packages/oauthlib/oauth1/rfc5849/utils.py", line 49, in escape
    raise ValueError('Only unicode objects are escapable. ' +
ValueError: Only unicode objects are escapable. Got None of type <class 'NoneType'>.