Hello,

We've been running a Mailman3 instance with Debian 10's official package:

Mailman Core Version: GNU Mailman 3.2.1 (La Villa Strangiato) Mailman Core API Version: 3.0 Mailman Core Python Version: 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]

For some reason, and only on some lists, when we try to see held messages on Postorius, we get an error message "An error occurred while processing your request." and the following error email:

""" Internal Server Error: /postorius/lists/list.example.com/held_messages

KeyError at /postorius/lists/list.example.com/held_messages 'file'

Request Method: GET Request URL: https://mailman.example.com/postorius/lists/list.example.com/held_messages Django Version: 1.11.29 Python Executable: /usr/bin/uwsgi-core Python Version: 3.7.3 Python Path: ['.', '', '/usr/lib/python37.zip', '/usr/lib/python3.7', '/usr/lib/python3.7/lib-dynload', '/usr/local/lib/python3.7/dist-packages', '/usr/lib/python3/dist-packages'] Server time: Thu, 24 Mar 2022 08:39:10 +0000 Installed Applications: ('hyperkitty', 'postorius', 'django_mailman3', 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.messages', 'django.contrib.staticfiles', 'rest_framework', 'django_gravatar', 'compressor', 'haystack', 'django_extensions', 'django_q', 'allauth', 'allauth.account', 'allauth.socialaccount') Installed Middleware: ('django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.middleware.locale.LocaleMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware', 'django.middleware.security.SecurityMiddleware', 'django_mailman3.middleware.TimezoneMiddleware', 'postorius.middleware.PostoriusMiddleware')

Traceback:

File "/usr/lib/python3/dist-packages/django/core/handlers/exception.py" in inner 41. response = get_response(request)

File "/usr/lib/python3/dist-packages/django/core/handlers/base.py" in _get_response 187. response = self.process_exception_by_middleware(e, request)

File "/usr/lib/python3/dist-packages/django/core/handlers/base.py" in _get_response 185. response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/usr/lib/python3/dist-packages/django/contrib/auth/decorators.py" in _wrapped_view 23. return view_func(request, *args, **kwargs)

File "/usr/lib/python3/dist-packages/postorius/auth/decorators.py" in wrapper 58. return fn(*args, **kwargs)

File "/usr/lib/python3/dist-packages/postorius/views/list.py" in list_moderation 520. paginator_class=MailmanPaginator)

File "/usr/lib/python3/dist-packages/django_mailman3/lib/paginator.py" in paginate 72. objects = paginator.page(page_num)

File "/usr/lib/python3/dist-packages/django_mailman3/lib/paginator.py" in page 48. result = self.function(count=self.per_page, page=number)

File "/usr/lib/python3/dist-packages/mailmanclient/restobjects/mailinglist.py" in get_held_page 134. return Page(self._connection, url, HeldMessage, count, page)

File "/usr/lib/python3/dist-packages/mailmanclient/restbase/page.py" in __init__ 37. self._create_page()

File "/usr/lib/python3/dist-packages/mailmanclient/restbase/page.py" in _create_page 62. response, content = self._connection.call(self._build_url())

File "/usr/lib/python3/dist-packages/mailmanclient/restbase/connection.py" in call 99. raise HTTPError(url, response.status, content, response, None)

  During handling of the above exception (HTTP Error 500: b'A server error occurred.  Please contact the administrator.'), another exception occurred:

File "/usr/lib/python3/dist-packages/django/core/handlers/exception.py" in inner 41. response = get_response(request)

File "/usr/lib/python3/dist-packages/postorius/middleware.py" in __call__ 39. return self.get_response(request)

File "/usr/lib/python3/dist-packages/django/core/handlers/exception.py" in inner 43. response = response_for_exception(request, exc)

File "/usr/lib/python3/dist-packages/django/core/handlers/exception.py" in response_for_exception 93. response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())

File "/usr/lib/python3/dist-packages/django/core/handlers/exception.py" in handle_uncaught_exception 135. extra={'status_code': 500, 'request': request},

File "/usr/lib/python3.7/logging/__init__.py" in error 1412. self._log(ERROR, msg, args, **kwargs)

File "/usr/lib/python3.7/logging/__init__.py" in _log 1519. self.handle(record)

File "/usr/lib/python3.7/logging/__init__.py" in handle 1529. self.callHandlers(record)

File "/usr/lib/python3.7/logging/__init__.py" in callHandlers 1591. hdlr.handle(record)

File "/usr/lib/python3.7/logging/__init__.py" in handle 905. self.emit(record)

File "/usr/lib/python3/dist-packages/django/utils/log.py" in emit 118. reporter = ExceptionReporter(request, is_email=True, *exc_info)

File "/usr/lib/python3/dist-packages/django/views/debug.py" in __init__ 246. self.template_info = getattr(self.exc_value, 'template_debug', None)

File "/usr/lib/python3.7/tempfile.py" in __getattr__ 614. file = self.__dict__['file']

Exception Type: KeyError at /postorius/lists/list.example.com/held_messages Exception Value: 'file' Request information: USER: root

GET: No GET data

POST: No POST data

FILES: No FILES data

COOKIES: rl_anonymous_id = '*' rl_user_id = '*' rl_group_id = '*' rl_trait = '*' rl_group_trait = '*' rl_page_init_referrer = '*' rl_page_init_referring_domain = '*' csrftoken = '*' sessionid = '*'

META: CONTENT_LENGTH = '' CONTENT_TYPE = '' CSRF_COOKIE = '*' DOCUMENT_ROOT = '/etc/nginx/html' HTTPS = 'on' HTTP_ACCEPT = 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8' HTTP_ACCEPT_ENCODING = 'gzip, deflate, br' HTTP_ACCEPT_LANGUAGE = 'en-US,en;q=0.5' HTTP_CACHE_CONTROL = 'max-age=0' HTTP_COOKIE = '*' HTTP_DNT = '1' HTTP_HOST = 'mailman.example.com' HTTP_REFERER = 'https://mailman.example.com/postorius/lists/list.example.com/' HTTP_SEC_FETCH_DEST = 'document' HTTP_SEC_FETCH_MODE = 'navigate' HTTP_SEC_FETCH_SITE = 'same-origin' HTTP_TE = 'trailers' HTTP_UPGRADE_INSECURE_REQUESTS = '1' HTTP_USER_AGENT = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:98.0) Gecko/20100101 Firefox/98.0' PATH_INFO = '/postorius/lists/list.example.com/held_messages' QUERY_STRING = '' REMOTE_ADDR = '::1' REMOTE_PORT = '58290' REQUEST_METHOD = 'GET' REQUEST_SCHEME = 'https' REQUEST_URI = '/postorius/lists/list.example.com/held_messages' SCRIPT_NAME = '' SERVER_NAME = 'mailman.example.com' SERVER_PORT = '443' SERVER_PROTOCOL = 'HTTP/2.0' uwsgi.core = 0 uwsgi.node = b'example.com' uwsgi.version = b'2.0.18-debian' wsgi.errors = <_io.TextIOWrapper name=2 mode='w' encoding='UTF-8'> wsgi.file_wrapper = '' wsgi.input = <uwsgi._Input object at 0x7f8f7a6bf870> wsgi.multiprocess = False wsgi.multithread = True wsgi.run_once = False wsgi.url_scheme = 'https' wsgi.version = '(1, 0)'

Settings: Using settings module settings ABSOLUTE_URL_OVERRIDES = {} ACCOUNT_AUTHENTICATION_METHOD = 'username_email' ACCOUNT_DEFAULT_HTTP_PROTOCOL = 'https' ACCOUNT_EMAIL_REQUIRED = True ACCOUNT_EMAIL_VERIFICATION = 'mandatory' ACCOUNT_UNIQUE_EMAIL = True ADMINS = "(('Mailman Suite Admin', 'admin@example.com'),)" ALLOWED_HOSTS = ['*'] APPEND_SLASH = True AUTHENTICATION_BACKENDS = "('django.contrib.auth.backends.ModelBackend', 'allauth.account.auth_backends.AuthenticationBackend')" AUTH_PASSWORD_VALIDATORS = '********************' AUTH_USER_MODEL = 'auth.User' BASE_DIR = '/usr/share/mailman3-web' CACHES = {'default': {'BACKEND': 'django.core.cache.backends.locmem.LocMemCache'}} CACHE_MIDDLEWARE_ALIAS = 'default' CACHE_MIDDLEWARE_KEY_PREFIX = '********************' CACHE_MIDDLEWARE_SECONDS = 600 COMPRESS_CACHEABLE_PRECOMPILERS = '()' COMPRESS_CACHE_BACKEND = 'default' COMPRESS_CACHE_KEY_FUNCTION = '********************' COMPRESS_CLEAN_CSS_ARGUMENTS = '' COMPRESS_CLEAN_CSS_BINARY = 'cleancss' COMPRESS_CLOSURE_COMPILER_ARGUMENTS = '' COMPRESS_CLOSURE_COMPILER_BINARY = 'java -jar compiler.jar' COMPRESS_CSS_COMPRESSOR = 'compressor.css.CssCompressor' COMPRESS_CSS_FILTERS = ['compressor.filters.css_default.CssAbsoluteFilter'] COMPRESS_CSS_HASHING_METHOD = 'mtime' COMPRESS_DATA_URI_MAX_SIZE = 1024 COMPRESS_DEBUG_TOGGLE = None COMPRESS_ENABLED = True COMPRESS_JINJA2_GET_ENVIRONMENT = <function CompressorConf.JINJA2_GET_ENVIRONMENT at 0x7f8f7b50d598> COMPRESS_JS_COMPRESSOR = 'compressor.js.JsCompressor' COMPRESS_JS_FILTERS = ['compressor.filters.jsmin.JSMinFilter'] COMPRESS_MINT_DELAY = 30 COMPRESS_MTIME_DELAY = 10 COMPRESS_OFFLINE = True COMPRESS_OFFLINE_CONTEXT = {'STATIC_URL': '/mailman3/static/'} COMPRESS_OFFLINE_MANIFEST = 'manifest.json' COMPRESS_OFFLINE_TIMEOUT = 31536000 COMPRESS_OUTPUT_DIR = 'CACHE' COMPRESS_PARSER = 'compressor.parser.AutoSelectParser' COMPRESS_PRECOMPILERS = "(('text/less', 'lessc {infile} {outfile}'), ('text/x-scss', 'sassc -t compressed {infile} {outfile}'), ('text/x-sass', 'sassc -t compressed {infile} {outfile}'))" COMPRESS_REBUILD_TIMEOUT = 2592000 COMPRESS_ROOT = '/var/lib/mailman3/web/static' COMPRESS_STORAGE = 'compressor.storage.CompressorFileStorage' COMPRESS_TEMPLATE_FILTER_CONTEXT = {'STATIC_URL': '/mailman3/static/'} COMPRESS_URL = '/mailman3/static/' COMPRESS_URL_PLACEHOLDER = '/__compressor_url_placeholder__/' COMPRESS_VERBOSE = False COMPRESS_YUGLIFY_BINARY = 'yuglify' COMPRESS_YUGLIFY_CSS_ARGUMENTS = '--terminal' COMPRESS_YUGLIFY_JS_ARGUMENTS = '--terminal' COMPRESS_YUI_BINARY = 'java -jar yuicompressor.jar' COMPRESS_YUI_CSS_ARGUMENTS = '' COMPRESS_YUI_JS_ARGUMENTS = '' CSRF_COOKIE_AGE = 31449600 CSRF_COOKIE_DOMAIN = None CSRF_COOKIE_HTTPONLY = False CSRF_COOKIE_NAME = 'csrftoken' CSRF_COOKIE_PATH = '/' CSRF_COOKIE_SECURE = False CSRF_FAILURE_VIEW = 'django.views.csrf.csrf_failure' CSRF_HEADER_NAME = 'HTTP_X_CSRFTOKEN' CSRF_TRUSTED_ORIGINS = [] CSRF_USE_SESSIONS = False DATABASES = {'default': {'ENGINE': 'django.db.backends.mysql', 'NAME': 'mailman3web', 'USER': 'mailman3web', 'PASSWORD': '********************', 'HOST': 'localhost', 'PORT': '', 'OPTIONS': {'init_command': "SET sql_mode='STRICT_TRANS_TABLES'", 'charset': 'utf8mb4'}, 'ATOMIC_REQUESTS': False, 'AUTOCOMMIT': True, 'CONN_MAX_AGE': 0, 'TIME_ZONE': None, 'TEST': {'CHARSET': None, 'COLLATION': None, 'NAME': None, 'MIRROR': None}}} DATABASE_ROUTERS = [] DATA_UPLOAD_MAX_MEMORY_SIZE = 2621440 DATA_UPLOAD_MAX_NUMBER_FIELDS = 1000 DATETIME_FORMAT = 'N j, Y, P' DATETIME_INPUT_FORMATS = ['%Y-%m-%d %H:%M:%S', '%Y-%m-%d %H:%M:%S.%f', '%Y-%m-%d %H:%M', '%Y-%m-%d', '%m/%d/%Y %H:%M:%S', '%m/%d/%Y %H:%M:%S.%f', '%m/%d/%Y %H:%M', '%m/%d/%Y', '%m/%d/%y %H:%M:%S', '%m/%d/%y %H:%M:%S.%f', '%m/%d/%y %H:%M', '%m/%d/%y'] DATE_FORMAT = 'N j, Y' DATE_INPUT_FORMATS = ['%Y-%m-%d', '%m/%d/%Y', '%m/%d/%y', '%b %d %Y', '%b %d, %Y', '%d %b %Y', '%d %b, %Y', '%B %d %Y', '%B %d, %Y', '%d %B %Y', '%d %B, %Y'] DEBUG = False DEBUG_PROPAGATE_EXCEPTIONS = False DECIMAL_SEPARATOR = '.' DEFAULT_CHARSET = 'utf-8' DEFAULT_CONTENT_TYPE = 'text/html' DEFAULT_EXCEPTION_REPORTER_FILTER = 'django.views.debug.SafeExceptionReporterFilter' DEFAULT_FILE_STORAGE = 'django.core.files.storage.FileSystemStorage' DEFAULT_FROM_EMAIL = 'postorius@example.com' DEFAULT_INDEX_TABLESPACE = '' DEFAULT_TABLESPACE = '' DISALLOWED_USER_AGENTS = [] EMAILNAME = 'example.com' EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend' EMAIL_HOST = 'localhost' EMAIL_HOST_PASSWORD = '********************' EMAIL_HOST_USER = '' EMAIL_PORT = 25 EMAIL_SSL_CERTFILE = None EMAIL_SSL_KEYFILE = '********************' EMAIL_SUBJECT_PREFIX = '[Django] ' EMAIL_TIMEOUT = None EMAIL_USE_LOCALTIME = False EMAIL_USE_SSL = False EMAIL_USE_TLS = False FILE_CHARSET = 'utf-8' FILE_UPLOAD_DIRECTORY_PERMISSIONS = None FILE_UPLOAD_HANDLERS = ['django.core.files.uploadhandler.MemoryFileUploadHandler', 'django.core.files.uploadhandler.TemporaryFileUploadHandler'] FILE_UPLOAD_MAX_MEMORY_SIZE = 2621440 FILE_UPLOAD_PERMISSIONS = None FILE_UPLOAD_TEMP_DIR = None FILTER_VHOST = False FIRST_DAY_OF_WEEK = 0 FIXTURE_DIRS = [] FORCE_SCRIPT_NAME = None FORMAT_MODULE_PATH = None FORM_RENDERER = 'django.forms.renderers.DjangoTemplates' HAYSTACK_CONNECTIONS = {'default': {'ENGINE': 'haystack.backends.whoosh_backend.WhooshEngine', 'PATH': '/var/lib/mailman3/web/fulltext_index'}} HOSTNAME = 'localhost.local' IGNORABLE_404_URLS = [] INSTALLED_APPS = "('hyperkitty', 'postorius', 'django_mailman3', 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.messages', 'django.contrib.staticfiles', 'rest_framework', 'django_gravatar', 'compressor', 'haystack', 'django_extensions', 'django_q', 'allauth', 'allauth.account', 'allauth.socialaccount')" INTERNAL_IPS = [] LANGUAGES = [('af', 'Afrikaans'), ('ar', 'Arabic'), ('ast', 'Asturian'), ('az', 'Azerbaijani'), ('bg', 'Bulgarian'), ('be', 'Belarusian'), ('bn', 'Bengali'), ('br', 'Breton'), ('bs', 'Bosnian'), ('ca', 'Catalan'), ('cs', 'Czech'), ('cy', 'Welsh'), ('da', 'Danish'), ('de', 'German'), ('dsb', 'Lower Sorbian'), ('el', 'Greek'), ('en', 'English'), ('en-au', 'Australian English'), ('en-gb', 'British English'), ('eo', 'Esperanto'), ('es', 'Spanish'), ('es-ar', 'Argentinian Spanish'), ('es-co', 'Colombian Spanish'), ('es-mx', 'Mexican Spanish'), ('es-ni', 'Nicaraguan Spanish'), ('es-ve', 'Venezuelan Spanish'), ('et', 'Estonian'), ('eu', 'Basque'), ('fa', 'Persian'), ('fi', 'Finnish'), ('fr', 'French'), ('fy', 'Frisian'), ('ga', 'Irish'), ('gd', 'Scottish Gaelic'), ('gl', 'Galician'), ('he', 'Hebrew'), ('hi', 'Hindi'), ('hr', 'Croatian'), ('hsb', 'Upper Sorbian'), ('hu', 'Hungarian'), ('ia', 'Interlingua'), ('id', 'Indonesian'), ('io', 'Ido'), ('is', 'Icelandic'), ('it', 'Italian'), ('ja', 'Japanese'), ('ka', 'Georgian'), ('kk', 'Kazakh'), ('km', 'Khmer'), ('kn', 'Kannada'), ('ko', 'Korean'), ('lb', 'Luxembourgish'), ('lt', 'Lithuanian'), ('lv', 'Latvian'), ('mk', 'Macedonian'), ('ml', 'Malayalam'), ('mn', 'Mongolian'), ('mr', 'Marathi'), ('my', 'Burmese'), ('nb', 'Norwegian Bokmål'), ('ne', 'Nepali'), ('nl', 'Dutch'), ('nn', 'Norwegian Nynorsk'), ('os', 'Ossetic'), ('pa', 'Punjabi'), ('pl', 'Polish'), ('pt', 'Portuguese'), ('pt-br', 'Brazilian Portuguese'), ('ro', 'Romanian'), ('ru', 'Russian'), ('sk', 'Slovak'), ('sl', 'Slovenian'), ('sq', 'Albanian'), ('sr', 'Serbian'), ('sr-latn', 'Serbian Latin'), ('sv', 'Swedish'), ('sw', 'Swahili'), ('ta', 'Tamil'), ('te', 'Telugu'), ('th', 'Thai'), ('tr', 'Turkish'), ('tt', 'Tatar'), ('udm', 'Udmurt'), ('uk', 'Ukrainian'), ('ur', 'Urdu'), ('vi', 'Vietnamese'), ('zh-hans', 'Simplified Chinese'), ('zh-hant', 'Traditional Chinese')] LANGUAGES_BIDI = ['he', 'ar', 'fa', 'ur'] LANGUAGE_CODE = 'en-us' LANGUAGE_COOKIE_AGE = None LANGUAGE_COOKIE_DOMAIN = None LANGUAGE_COOKIE_NAME = 'django_language' LANGUAGE_COOKIE_PATH = '/' LOCALE_PATHS = [] LOGGING = {'version': 1, 'disable_existing_loggers': False, 'filters': {'require_debug_false': {'()': 'django.utils.log.RequireDebugFalse'}}, 'handlers': {'mail_admins': {'level': 'ERROR', 'filters': ['require_debug_false'], 'class': 'django.utils.log.AdminEmailHandler'}, 'file': {'level': 'INFO', 'class': 'logging.handlers.RotatingFileHandler', 'filename': '/var/log/mailman3/web/mailman-web.log', 'formatter': 'verbose'}, 'console': {'class': 'logging.StreamHandler', 'formatter': 'simple'}}, 'loggers': {'django.request': {'handlers': ['mail_admins', 'file'], 'level': 'INFO', 'propagate': True}, 'django': {'handlers': ['file'], 'level': 'INFO', 'propagate': True}, 'hyperkitty': {'handlers': ['file'], 'level': 'INFO', 'propagate': True}, 'postorius': {'handlers': ['file'], 'level': 'INFO', 'propagate': True}}, 'formatters': {'verbose': {'format': '%(levelname)s %(asctime)s %(process)d %(name)s %(message)s'}, 'simple': {'format': '%(levelname)s %(message)s'}}} LOGGING_CONFIG = 'logging.config.dictConfig' LOGIN_REDIRECT_URL = 'list_index' LOGIN_URL = 'account_login' LOGOUT_REDIRECT_URL = None LOGOUT_URL = 'account_logout' MAILMAN_ARCHIVER_FROM = "('127.0.0.1', '::1')" MAILMAN_ARCHIVER_KEY = '********************' MAILMAN_REST_API_PASS = '********************' MAILMAN_REST_API_URL = '********************' MAILMAN_REST_API_USER = '********************' MANAGERS = [] MEDIA_ROOT = '' MEDIA_URL = '' MESSAGE_STORAGE = 'django.contrib.messages.storage.fallback.FallbackStorage' MESSAGE_TAGS = {40: 'danger'} MIDDLEWARE = "('django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.middleware.locale.LocaleMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware', 'django.middleware.security.SecurityMiddleware', 'django_mailman3.middleware.TimezoneMiddleware', 'postorius.middleware.PostoriusMiddleware')" MIDDLEWARE_CLASSES = ['django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware'] MIGRATION_MODULES = {} MONTH_DAY_FORMAT = 'F j' NUMBER_GROUPING = 0 PASSWORD_HASHERS = '********************' PASSWORD_RESET_TIMEOUT_DAYS = '********************' POSTORIUS_TEMPLATE_BASE_URL = 'https://mailman.example.com/' PREPEND_WWW = False Q_CLUSTER = {'timeout': 300, 'save_limit': 100, 'orm': 'default', 'poll': 5} ROOT_URLCONF = 'urls' SECRET_KEY = '********************' SECURE_BROWSER_XSS_FILTER = False SECURE_CONTENT_TYPE_NOSNIFF = False SECURE_HSTS_INCLUDE_SUBDOMAINS = False SECURE_HSTS_PRELOAD = False SECURE_HSTS_SECONDS = 0 SECURE_PROXY_SSL_HEADER = None SECURE_REDIRECT_EXEMPT = [] SECURE_SSL_HOST = None SECURE_SSL_REDIRECT = False SERVER_EMAIL = 'root@example.com' SESSION_CACHE_ALIAS = 'default' SESSION_COOKIE_AGE = 1209600 SESSION_COOKIE_DOMAIN = None SESSION_COOKIE_HTTPONLY = True SESSION_COOKIE_NAME = 'sessionid' SESSION_COOKIE_PATH = '/' SESSION_COOKIE_SECURE = False SESSION_ENGINE = 'django.contrib.sessions.backends.db' SESSION_EXPIRE_AT_BROWSER_CLOSE = False SESSION_FILE_PATH = None SESSION_SAVE_EVERY_REQUEST = False SESSION_SERIALIZER = 'django.contrib.sessions.serializers.PickleSerializer' SETTINGS_MODULE = 'settings' SHORT_DATETIME_FORMAT = 'm/d/Y P' SHORT_DATE_FORMAT = 'm/d/Y' SIGNING_BACKEND = 'django.core.signing.TimestampSigner' SILENCED_SYSTEM_CHECKS = [] SITE_ID = 1 SOCIALACCOUNT_PROVIDERS = {} STATICFILES_DIRS = '()' STATICFILES_FINDERS = "('django.contrib.staticfiles.finders.FileSystemFinder', 'django.contrib.staticfiles.finders.AppDirectoriesFinder', 'compressor.finders.CompressorFinder')" STATICFILES_STORAGE = 'django.contrib.staticfiles.storage.StaticFilesStorage' STATIC_ROOT = '/var/lib/mailman3/web/static' STATIC_URL = '/mailman3/static/' TEMPLATES = [{'BACKEND': 'django.template.backends.django.DjangoTemplates', 'DIRS': [], 'APP_DIRS': True, 'OPTIONS': {'context_processors': ['django.template.context_processors.debug', 'django.template.context_processors.i18n', 'django.template.context_processors.media', 'django.template.context_processors.static', 'django.template.context_processors.tz', 'django.template.context_processors.csrf', 'django.template.context_processors.request', 'django.contrib.auth.context_processors.auth', 'django.contrib.messages.context_processors.messages', 'django_mailman3.context_processors.common', 'hyperkitty.context_processors.common', 'postorius.context_processors.postorius']}}] TEST_NON_SERIALIZED_APPS = [] TEST_RUNNER = 'django.test.runner.DiscoverRunner' THOUSAND_SEPARATOR = ',' TIME_FORMAT = 'P' TIME_INPUT_FORMATS = ['%H:%M:%S', '%H:%M:%S.%f', '%H:%M'] TIME_ZONE = 'UTC' USE_ETAGS = False USE_I18N = True USE_L10N = True USE_THOUSAND_SEPARATOR = False USE_TZ = True USE_X_FORWARDED_HOST = True USE_X_FORWARDED_PORT = False WSGI_APPLICATION = 'wsgi.application' X_FRAME_OPTIONS = 'SAMEORIGIN' YEAR_MONTH_FORMAT = 'F Y' """

I've tried to debug this issue as much as I can but couldn't figure out anything. I wonder if anyone has encountered something like this or might have a clue about what's the problem here?

Thanks in advance, Berkay