pythonpackages error on login

gistfile1.txt

Internal Server Error

Traceback (most recent call last):
  File "/app/.heroku/venv/lib/python2.7/site-packages/waitress/channel.py", line 329, in service
    task.service()
  File "/app/.heroku/venv/lib/python2.7/site-packages/waitress/task.py", line 173, in service
    self.execute()
  File "/app/.heroku/venv/lib/python2.7/site-packages/waitress/task.py", line 380, in execute
    app_iter = self.channel.server.application(env, start_response)
  File "/app/.heroku/venv/lib/python2.7/site-packages/newrelic-1.2.1.265/newrelic/api/web_transaction.py", line 490, in __call__
    result = application(environ, _start_response)
  File "/app/.heroku/venv/lib/python2.7/site-packages/newrelic-1.2.1.265/newrelic/api/function_trace.py", line 82, in __call__
    return self._nr_next_object(*args, **kwargs)
  File "/app/.heroku/venv/lib/python2.7/site-packages/errormator_client/wsgi.py", line 48, in __call__
    app_iter = self.app(environ, detect_headers)
  File "/app/.heroku/venv/lib/python2.7/site-packages/pyramid/router.py", line 187, in __call__
    response = self.handle_request(request)
  File "/app/.heroku/venv/lib/python2.7/site-packages/pyramid/tweens.py", line 20, in excview_tween
    response = handler(request)
  File "/app/.heroku/venv/lib/python2.7/site-packages/pyramid/router.py", line 164, in handle_request
    response = view_callable(context, request)
  File "/app/.heroku/venv/lib/python2.7/site-packages/pyramid/config/views.py", line 333, in rendered_view
    result = view(context, request)
  File "/app/.heroku/venv/lib/python2.7/site-packages/pyramid/config/views.py", line 471, in _requestonly_view
    response = view(request)
  File "/app/src/vanity_app/vanity_app/views.py", line 198, in login
    headers = remember(request, userid)
  File "/app/.heroku/venv/lib/python2.7/site-packages/pyramid/security.py", line 174, in remember
    return policy.remember(request, principal, **kw)
  File "/app/.heroku/venv/lib/python2.7/site-packages/pyramid/authentication.py", line 397, in remember
    return self.cookie.remember(request, principal, **kw)
  File "/app/.heroku/venv/lib/python2.7/site-packages/pyramid/authentication.py", line 755, in remember
    cookie_value = ticket.cookie_value()
  File "/app/.heroku/venv/lib/python2.7/site-packages/pyramid/authentication.py", line 449, in cookie_value
    v = '%s%08x%s!' % (self.digest(), int(self.time),
  File "/app/.heroku/venv/lib/python2.7/site-packages/pyramid/authentication.py", line 446, in digest
    self.user_data)
  File "/app/.heroku/venv/lib/python2.7/site-packages/pyramid/authentication.py", line 514, in calculate_digest
    + tokens + b'\0' + user_data).hexdigest()
TypeError: cannot concatenate 'str' and 'NoneType' objects


(generated by waitress)