I am also facing the same issue as KeyError 'file'.
The complete traceback is shown below.
Can someone please help me on this?
KeyError at /postorius/lists/

'file'

Request Method: GET
Request URL: http://127.0.0.1:8000/postorius/lists/
Django Version: 2.1.7
Exception Type: KeyError
Exception Value:

'file'

Exception Location:
/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/tempfile.py
in __getattr__, line 616
Python Executable: /home/nayankhanna/Code/GSoC19/mailman/venv3/bin/python3
Python Version: 3.6.5
Python Path:

['/home/nayankhanna/Code/GSoC19/mailman/mailman-suite/mailman-suite_project',
 '/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python36.zip',
 '/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6',
 '/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/lib-dynload',
 '/usr/lib/python3.6',
 '/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages',
 '/home/nayankhanna/Code/GSoC19/mailman/mailman/src',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/zope.interface-4.6.0-py3.6-linux-x86_64.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/zope.event-4.4-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/zope.configuration-4.3.1-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/zope.component-4.5-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/SQLAlchemy-1.3.0-py3.6-linux-x86_64.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/requests-2.21.0-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/passlib-1.7.1-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/lazr.config-2.2.1-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/importlib_resources-1.0.2-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/flufl.lock-3.2-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/flufl.i18n-2.0.1-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/flufl.bounce-3.0-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/falcon-2.0.0a1-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/dnspython-1.16.0-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/Click-7.0-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/atpublic-1.0-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/alembic-1.0.8-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/aiosmtpd-1.2-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/zope.schema-4.9.3-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/zope.i18nmessageid-4.3.1-py3.6-linux-x86_64.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/zope.hookable-4.2.0-py3.6-linux-x86_64.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/zope.deprecation-4.4.0-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/zope.deferredimport-4.3-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/urllib3-1.24.1-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/idna-2.8-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/chardet-3.0.4-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/certifi-2018.11.29-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/lazr.delegates-2.0.4-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/python_dateutil-2.8.0-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/python_editor-1.0.4-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/Mako-1.0.7-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/six-1.12.0-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/zope.proxy-4.3.1-py3.6-linux-x86_64.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/nose-1.3.7-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/MarkupSafe-1.1.1-py3.6-linux-x86_64.egg',
 '/home/nayankhanna/Code/GSoC19/mailman/mailmanclient/src',
 '/home/nayankhanna/Code/GSoC19/mailman/django-mailman3',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/django_compressor-2.2-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/pytz-2018.9-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/django_gravatar2-1.4.2-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/django_allauth-0.39.1-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/rjsmin-1.0.12-py3.6-linux-x86_64.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/rcssmin-1.0.6-py3.6-linux-x86_64.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/django_appconf-1.0.3-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/requests_oauthlib-1.2.0-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/python3_openid-3.1.0-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/oauthlib-3.0.1-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/defusedxml-0.5.0-py3.6.egg',
 '/home/nayankhanna/Code/GSoC19/mailman/postorius/src',
 '/home/nayankhanna/Code/GSoC19/mailman/hyperkitty',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/django_q-1.0.1-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/lockfile-0.12.2-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/django_extensions-2.1.6-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/django_haystack-2.8.1-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/networkx-2.2-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/robot_detection-0.4-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/djangorestframework-3.9.2-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/django_picklefield-2.0-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/blessed-1.15.0-py3.6.egg',
 
'/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/arrow-0.13.1-py3.6.egg',
 '/home/nayankhanna/Code/GSoC19/mailman/mailman-hyperkitty',
 '/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages']

Server time: Wed, 6 Mar 2019 18:54:10 +0000
Traceback Switch to copy-and-paste view
<http://127.0.0.1:8000/postorius/lists/#>

   -
   
/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg/django/core/handlers/exception.py
    in inner
   1.

                  response = get_response(request)

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   -
   
/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg/django/core/handlers/base.py
    in _get_response
   1.

                      response =
self.process_exception_by_middleware(e, request)

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   -
   
/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg/django/core/handlers/base.py
    in _get_response
   1.

                      response = wrapped_callback(request,
*callback_args, **callback_kwargs)

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   -
   /home/nayankhanna/Code/GSoC19/mailman/postorius/src/postorius/views/list.py
    in list_index
   1.

              return list_index_authenticated(request)

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   -
   
/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg/django/contrib/auth/decorators.py
    in _wrapped_view
   1.

                      return view_func(request, *args, **kwargs)

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   -
   /home/nayankhanna/Code/GSoC19/mailman/postorius/src/postorius/views/list.py
    in list_index_authenticated
   1.

          choosable_domains = _get_choosable_domains(request)

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   -
   /home/nayankhanna/Code/GSoC19/mailman/postorius/src/postorius/views/list.py
    in _get_choosable_domains
   1.

          domains = Domain.objects.all()

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   - /home/nayankhanna/Code/GSoC19/mailman/postorius/src/postorius/models.py
    in all
   1.

                  return getattr(get_mailman_client(),
self.resource_name_plural)

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   -
   
/home/nayankhanna/Code/GSoC19/mailman/mailmanclient/src/mailmanclient/client.py
    in domains
   1.

              response, content = self._connection.call('domains')

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   -
   
/home/nayankhanna/Code/GSoC19/mailman/mailmanclient/src/mailmanclient/restbase/connection.py
    in call
   1.

                                      response.content, response, None)

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   - During handling of the above exception (HTTP Error 500: b'A server
   error occurred. Please contact the administrator.'), another exception
   occurred:
   -
   
/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg/django/core/handlers/exception.py
    in inner
   1.

                  response = get_response(request)

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   -
   /home/nayankhanna/Code/GSoC19/mailman/postorius/src/postorius/middleware.py
    in __call__
   1.

              return self.get_response(request)

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   -
   
/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg/django/core/handlers/exception.py
    in inner
   1.

                  response = response_for_exception(request, exc)

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   -
   
/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg/django/core/handlers/exception.py
    in response_for_exception
   1.

              response = handle_uncaught_exception(request,
get_resolver(get_urlconf()), sys.exc_info())

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   -
   
/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg/django/core/handlers/exception.py
    in handle_uncaught_exception
   1.

              return debug.technical_500_response(request, *exc_info)

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   -
   
/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg/django/views/debug.py
    in technical_500_response
   1.

          reporter = ExceptionReporter(request, exc_type, exc_value, tb)

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   -
   
/home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg/django/views/debug.py
    in __init__
   1.

              self.template_info = getattr(self.exc_value,
'template_debug', None)

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>
   - /home/nayankhanna/Code/GSoC19/mailman/venv3/lib/python3.6/tempfile.py
    in __getattr__
   1.

              file = self.__dict__['file']

      ...
   ▶ Local vars <http://127.0.0.1:8000/postorius/lists/#>


On Thu, Mar 7, 2019 at 12:12 AM aaryan bhagat <aaryanbhagat...@gmail.com>
wrote:

> Ok, I will check. Thanks  Dinesh Xiaoxing
>
> On Thu, 7 Mar 2019, 00:08 Krishna Kumar Dey, <
> krishnakumardey....@gmail.com>
> wrote:
>
> > There is already an issue created for the same. Xiaoxing mention about
> > in  the threads. You can check the issue here
> > https://gitlab.com/mailman/hyperkitty/issues/72
> >
> > On Thu, Mar 7, 2019 at 12:04 AM aaryan bhagat <aaryanbhagat...@gmail.com
> >
> > wrote:
> >
> >> Like should we create a  issue for this.
> >> (I am asking to everyone who has replied to this thread atleast and to
> >> the administrators also)
> >>
> >> On Thu, 7 Mar 2019, 00:02 Krishna Kumar Dey, <
> >> krishnakumardey....@gmail.com> wrote:
> >>
> >>> Yes I also faced this issue and did the same thing as Xiaoxing
> >>> mentioned. Removing the paintstore from Installed apps works for now.
> >>> @aaryan It's not yet updated . We need to find an alternative for it.
> >>>
> >>> On Wed, Mar 6, 2019 at 11:43 PM aaryan bhagat <
> aaryanbhagat...@gmail.com>
> >>> wrote:
> >>>
> >>>> Hi Xiaoxing,
> >>>> If you are saying 'painstore'
> >>>> is not required as of feb 22 canbot we just update the repo to latest
> >>>> version with paintstore not there?
> >>>> Is it done?
> >>>>
> >>>> On Wed, 6 Mar 2019, 23:35 Xiaoxing Ye, <y...@xiaoxing.us> wrote:
> >>>>
> >>>> > Hi Dinesh,
> >>>> >
> >>>> > Your error message is not completed. I am guessing there are two
> >>>> > possibilities,
> >>>> >
> >>>> > 1. You have no sassc installed. In this case, please install using
> >>>> apt.
> >>>> > 2. It is asking for paintstore. As of the release on Feb 22,
> >>>> ``paintstore``
> >>>> > is no longer a dependency of Hyperkitty. This change requires that
> >>>> people
> >>>> > change their ``settings.py`` and remove ``paintstore`` from
> >>>> > ``INSTALLED_APPS``. (See #72). Please try it
> >>>> > 3. If none of them hits your problem, please reply with the complete
> >>>> error
> >>>> > traceback.
> >>>> >
> >>>> >
> >>>> > On Wed, Mar 6, 2019 at 9:33 PM Dinesh Bhagat <
> >>>> db.dineshbhaga...@gmail.com>
> >>>> > wrote:
> >>>> >
> >>>> > > On running command .....: "python manage.py migrate" after
> >>>> mailman-suite
> >>>> > > installation.
> >>>> > >
> >>>> > > This is showing the below Given error.
> >>>> > > Please help me out.
> >>>> > >
> >>>> > > Traceback (most recent call last):
> >>>> > >   File "manage.py", line 10, in <module>
> >>>> > >     execute_from_command_line(sys.argv)
> >>>> > >   File
> >>>> > >
> >>>> >
> >>>>
> "/home/dinesh/Desktop/GSoC/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg/django/core/management/__init__.py",
> >>>> > > line 381, in execute_from_command_line
> >>>> > >     utility.execute()
> >>>> > >   File
> >>>> > >
> >>>> >
> >>>>
> "/home/dinesh/Desktop/GSoC/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg/django/core/management/__init__.py",
> >>>> > > line 357, in execute
> >>>> > >     django.setup()
> >>>> > >   File
> >>>> > >
> >>>> >
> >>>>
> "/home/dinesh/Desktop/GSoC/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg/django/__init__.py",
> >>>> > > line 24, in setup
> >>>> > >     apps.populate(settings.INSTALLED_APPS)
> >>>> > >   File
> >>>> > >
> >>>> >
> >>>>
> "/home/dinesh/Desktop/GSoC/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg/django/apps/registry.py",
> >>>> > > line 89, in populate
> >>>> > >     app_config = AppConfig.create(entry)
> >>>> > >   File
> >>>> > >
> >>>> >
> >>>>
> "/home/dinesh/Desktop/GSoC/mailman/venv3/lib/python3.6/site-packages/Django-2.1.7-py3.6.egg/django/apps/config.py",
> >>>> > > line 90, in create
> >>>> > >     module = import_module(entry)
> >>>> > >   File "/usr/lib/python3.6/importlib/__init__.py", line 126, in
> >>>> > > import_module
> >>>> > >     return _bootstrap._gcd_import(name[level:], package, level)
> >>>> > >   File "<frozen importlib._bootstrap>", line 994, in _gcd_import
> >>>> > > _______________________________________________
> >>>> > > Mailman-Developers mailing list -- mailman-developers@python.org
> >>>> > > To unsubscribe send an email to
> mailman-developers-le...@python.org
> >>>> > >
> >>>> https://mail.python.org/mailman3/lists/mailman-developers.python.org/
> >>>> > > Mailman FAQ: https://wiki.list.org/x/AgA3
> >>>> > >
> >>>> > > Security Policy: https://wiki.list.org/x/QIA9
> >>>> > >
> >>>> > _______________________________________________
> >>>> > Mailman-Developers mailing list -- mailman-developers@python.org
> >>>> > To unsubscribe send an email to mailman-developers-le...@python.org
> >>>> >
> https://mail.python.org/mailman3/lists/mailman-developers.python.org/
> >>>> > Mailman FAQ: https://wiki.list.org/x/AgA3
> >>>> >
> >>>> > Security Policy: https://wiki.list.org/x/QIA9
> >>>> >
> >>>> _______________________________________________
> >>>> Mailman-Developers mailing list -- mailman-developers@python.org
> >>>> To unsubscribe send an email to mailman-developers-le...@python.org
> >>>> https://mail.python.org/mailman3/lists/mailman-developers.python.org/
> >>>> Mailman FAQ: https://wiki.list.org/x/AgA3
> >>>>
> >>>> Security Policy: https://wiki.list.org/x/QIA9
> >>>>
> >>>
> _______________________________________________
> Mailman-Developers mailing list -- mailman-developers@python.org
> To unsubscribe send an email to mailman-developers-le...@python.org
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