imported_units references before assignment when scheduling models.

[rgerkin]

Trying to schedule one model and test at the staging IP address under the rgerkin account as shown below:

Results in the error below. Since this could very well be an error in my code, please let me know how I can most quickly determine this.

Error: Internal Server Error

UnboundLocalError at /api/compatibility/
local variable 'imported_units' referenced before assignment Request Method: POST Request URL: http://35.188.223.116:8000/api/compatibility/ Django Version: 1.11.23 Python Executable: /app/scidash/venv/bin/python3 Python Version: 3.6.10 Python Path: ['/app/scidash/venv/lib/python3.6/site-packages/git/ext/gitdb', '/app/scidash', '/usr/local/lib/python36.zip', '/usr/local/lib/python3.6', '/usr/local/lib/python3.6/lib-dynload', '/app/scidash/venv/lib/python3.6/site-packages', '/app/scidash/pygeppetto-django', '/app/scidash', '/app/scidash/venv/lib/python3.6/site-packages/IPython/extensions', '/app/scidash/venv/lib/python3.6/site-packages/gitdb/ext/smmap'] Server time: Mon, 23 Nov 2020 16:39:26 +0000 Installed Applications: ['django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'django.contrib.postgres', 'pygeppetto_server', 'channels', 'rest_framework', 'django_extensions', 'django_filters', 'rest_framework_cache', 'material', 'django_celery_beat', 'django_celery_results', 'django_db_logger', 'ckeditor', 'adminsortable2', 'scidash.sciunitmodels', 'scidash.sciunittests', 'scidash.general', 'scidash.account', 'scidash.logviewer'] Installed Middleware: ['django.middleware.gzip.GZipMiddleware', 'django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.auth.middleware.SessionAuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware'] Traceback: File "/usr/local/lib/python3.6/json/decoder.py" in raw_decode 355. obj, end = self.scan_once(s, idx) During handling of the above exception (0), another exception occurred: File "/app/scidash/scidash/general/api/views.py" in get_observation 46. imported_units = json.loads(units) File "/usr/local/lib/python3.6/json/__init__.py" in loads 354. return _default_decoder.decode(s) File "/usr/local/lib/python3.6/json/decoder.py" in decode 339. obj, end = self.raw_decode(s, idx=_w(s, 0).end()) File "/usr/local/lib/python3.6/json/decoder.py" in raw_decode 357. raise JSONDecodeError("Expecting value", s, err.value) from None During handling of the above exception (Expecting value: line 1 column 1 (char 0)), another exception occurred: File "/app/scidash/venv/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner 41. response = get_response(request) File "/app/scidash/venv/lib/python3.6/site-packages/django/core/handlers/base.py" in _legacy_get_response 249. response = self._get_response(request) File "/app/scidash/venv/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response 187. response = self.process_exception_by_middleware(e, request) File "/app/scidash/venv/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response 185. response = wrapped_callback(request, *callback_args, **callback_kwargs) File "/app/scidash/venv/lib/python3.6/site-packages/django/views/decorators/csrf.py" in wrapped_view 58. return view_func(*args, **kwargs) File "/app/scidash/venv/lib/python3.6/site-packages/django/views/generic/base.py" in view 68. return self.dispatch(request, *args, **kwargs) File "/app/scidash/venv/lib/python3.6/site-packages/rest_framework/views.py" in dispatch 489. response = self.handle_exception(exc) File "/app/scidash/venv/lib/python3.6/site-packages/rest_framework/views.py" in handle_exception 449. self.raise_uncaught_exception(exc) File "/app/scidash/venv/lib/python3.6/site-packages/rest_framework/views.py" in dispatch 486. response = handler(request, *args, **kwargs) File "/app/scidash/scidash/general/api/views.py" in post 97. ) for test in test_models File "/app/scidash/scidash/general/api/views.py" in 97. ) for test in test_models File "/app/scidash/scidash/general/api/views.py" in get_observation 51. imported_units = import_class(imported_units) Exception Type: UnboundLocalError at /api/compatibility/ Exception Value: local variable 'imported_units' referenced before assignment Request information: USER: rgerkin GET: No GET data POST: No POST data FILES: No FILES data COOKIES: __utmz = '94954206.1605888760.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)' __utma = '94954206.669829707.1605888760.1605888760.1606149052.2' __utmc = '94954206' __utmt = '1' csrftoken = 'okuTBHn7p99YilbNNT8Qu7bfWYDCDvbwBgvSljDKYITB8lhHsJeQPdi4DCz4OYZ2' sessionid = '3mgveyf9ki5fcru9stzn0cn9nce2mq5i' __utmb = '94954206.4.10.1606149052' META: CONTENT_LENGTH = '28' CONTENT_TYPE = 'application/json' HTTP_ACCEPT = 'application/json' HTTP_ACCEPT_ENCODING = 'gzip, deflate' HTTP_ACCEPT_LANGUAGE = 'en-US,en;q=0.9,be;q=0.8' HTTP_CONNECTION = 'keep-alive' HTTP_COOKIE = '__utmz=94954206.1605888760.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); __utma=94954206.669829707.1605888760.1605888760.1606149052.2; __utmc=94954206; __utmt=1; csrftoken=okuTBHn7p99YilbNNT8Qu7bfWYDCDvbwBgvSljDKYITB8lhHsJeQPdi4DCz4OYZ2; sessionid=3mgveyf9ki5fcru9stzn0cn9nce2mq5i; __utmb=94954206.4.10.1606149052' HTTP_HOST = '35.188.223.116:8000' HTTP_ORIGIN = 'http://35.188.223.116:8000' HTTP_REFERER = 'http://35.188.223.116:8000/scheduling/' HTTP_USER_AGENT = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36' PATH_INFO = '/api/compatibility/' QUERY_STRING = '' REMOTE_ADDR = '10.128.15.194' REMOTE_HOST = '10.128.15.194' REMOTE_PORT = 59467 REQUEST_METHOD = 'POST' SCRIPT_NAME = '' SERVER_NAME = '10.52.4.245' SERVER_PORT = '8000' wsgi.multiprocess = True wsgi.multithread = True Settings: Using settings module scidash.main.settings ABSOLUTE_URL_OVERRIDES = {} ACCEPTABLE_SCORE_INSTANCES_AMOUNT = 50 ADMINS = [] ALLOWED_HOSTS = ['*'] APPEND_SLASH = True ASGI_APPLICATION = 'scidash.main.routing.application' AUTHENTICATION_BACKENDS = ['django.contrib.auth.backends.ModelBackend'] AUTH_PASSWORD_VALIDATORS = '********************' AUTH_USER_MODEL = 'general.ScidashUser' BASE_DIR = '/app/scidash' BASE_PROJECT_FILES_HOST = 'http://scidash:8000/static/projects/' CACHES = {'default': {'BACKEND': 'django.core.cache.backends.locmem.LocMemCache'}} CACHE_MIDDLEWARE_ALIAS = 'default' CACHE_MIDDLEWARE_KEY_PREFIX = '********************' CACHE_MIDDLEWARE_SECONDS = 600 CELERY_RESULT_BACKEND = 'django-db' CKEDITOR_CONFIGS = {'default': {'skin': 'moono', 'toolbar_Basic': [['Source', '-', 'Bold', 'Italic']], 'toolbar_YourCustomToolbarConfig': [{'name': 'document', 'items': ['Source', '-', 'Save', 'NewPage', 'Preview', 'Print', '-', 'Templates']}, {'name': 'clipboard', 'items': ['Cut', 'Copy', 'Paste', 'PasteText', 'PasteFromWord', '-', 'Undo', 'Redo']}, {'name': 'editing', 'items': ['Find', 'Replace', '-', 'SelectAll']}, {'name': 'forms', 'items': ['Form', 'Checkbox', 'Radio', 'TextField', 'Textarea', 'Select', 'Button', 'ImageButton', 'HiddenField']}, '/', {'name': 'basicstyles', 'items': ['Bold', 'Italic', 'Underline', 'Strike', 'Subscript', 'Superscript', '-', 'RemoveFormat']}, {'name': 'paragraph', 'items': ['NumberedList', 'BulletedList', '-', 'Outdent', 'Indent', '-', 'Blockquote', 'CreateDiv', '-', 'JustifyLeft', 'JustifyCenter', 'JustifyRight', 'JustifyBlock', '-', 'BidiLtr', 'BidiRtl', 'Language']}, {'name': 'links', 'items': ['Link', 'Unlink', 'Anchor']}, {'name': 'insert', 'items': ['Image', 'Flash', 'Table', 'HorizontalRule', 'Smiley', 'SpecialChar', 'PageBreak', 'Iframe']}, '/', {'name': 'styles', 'items': ['Styles', 'Format', 'Font', 'FontSize']}, {'name': 'colors', 'items': ['TextColor', 'BGColor']}, {'name': 'tools', 'items': ['Maximize', 'ShowBlocks']}, {'name': 'about', 'items': ['About']}, '/', {'name': 'yourcustomtools', 'items': ['Preview', 'Maximize']}], 'toolbar': 'YourCustomToolbarConfig', 'tabSpaces': 4, 'extraPlugins': 'uploadimage,div,autolink,autoembed,embedsemantic,autogrow,widget,lineutils,clipboard,dialog,dialogui,elementspath'}} 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.postgresql', 'NAME': 'scidash', 'USER': 'scidash_admin', 'PASSWORD': '********************', 'HOST': 'scidash-postgres', 'PORT': '5432', 'ATOMIC_REQUESTS': False, 'AUTOCOMMIT': True, 'CONN_MAX_AGE': 0, 'OPTIONS': {}, '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 = True 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 = 'webmaster@localhost' DEFAULT_INDEX_TABLESPACE = '' DEFAULT_TABLESPACE = '' DISALLOWED_USER_AGENTS = [] DJANGO_APPS = ['django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'django.contrib.postgres'] DOWNLOADED_MODEL_DIR = '/app/scidash/static/models' EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend' EMAIL_HOST = 'smtp.gmail.com' EMAIL_HOST_PASSWORD = '********************' EMAIL_HOST_USER = 'scidashasu@gmail.com' EMAIL_PORT = 465 EMAIL_SSL_CERTFILE = None EMAIL_SSL_KEYFILE = '********************' EMAIL_SUBJECT_PREFIX = '[Django] ' EMAIL_TIMEOUT = None EMAIL_USE_LOCALTIME = False EMAIL_USE_SSL = True 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 FIRST_DAY_OF_WEEK = 0 FIXTURE_DIRS = [] FORCE_SCRIPT_NAME = None FORMAT_MODULE_PATH = None FORM_RENDERER = 'django.forms.renderers.DjangoTemplates' GEPPETTO_BASE_URL = 'http://scidash-virgo:8080/org.geppetto.frontend/geppetto' GEPPETTO_SERVLET_URL = 'ws://scidash-virgo:8080/org.geppetto.frontend/GeppettoServlet' IGNORABLE_404_URLS = [] INSTALLED_APPS = ['django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'django.contrib.postgres', 'pygeppetto_server', 'channels', 'rest_framework', 'django_extensions', 'django_filters', 'rest_framework_cache', 'material', 'django_celery_beat', 'django_celery_results', 'django_db_logger', 'ckeditor', 'adminsortable2', 'scidash.sciunitmodels', 'scidash.sciunittests', 'scidash.general', 'scidash.account', 'scidash.logviewer'] 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, 'formatters': {'verbose': {'format': '%(levelname)s %(asctime)s %(module)s %(process)d %(thread)d %(message)s'}, 'simple': {'format': '%(levelname)s %(asctime)s %(message)s'}}, 'handlers': {'db_log': {'level': 'DEBUG', 'class': 'django_db_logger.db_log_handler.DatabaseLogHandler'}}, 'loggers': {'django': {'handlers': ['db_log'], 'level': 'ERROR', 'propagate': False}, 'db': {'handlers': ['db_log'], 'level': 'DEBUG'}}} LOGGING_CONFIG = 'logging.config.dictConfig' LOGIN_REDIRECT_URL = '/accounts/profile/' LOGIN_URL = '/accounts/login/' LOGOUT_REDIRECT_URL = '/' MANAGERS = [] MEDIA_ROOT = '' MEDIA_URL = '' MESSAGE_STORAGE = 'django.contrib.messages.storage.fallback.FallbackStorage' MIDDLEWARE = None MIDDLEWARE_CLASSES = ['django.middleware.gzip.GZipMiddleware', 'django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.auth.middleware.SessionAuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware'] MIGRATION_MODULES = {} MONTH_DAY_FORMAT = 'F j' NO_IMPORT_TAG = 'unschedulable' NUMBER_GROUPING = 0 PASSWORD_HASHERS = '********************' PASSWORD_RESET_TIMEOUT_DAYS = '********************' POPULATE_USERS = True PREPEND_WWW = False PYGEPPETTO_BUILDER_PROJECT_BASE_URL = '/app/scidash/static/projects' PYGEPPETTO_SOCKET_URL = 'org.geppetto.frontend/GeppettoServlet' REST_FRAMEWORK = {'DEFAULT_AUTHENTICATION_CLASSES': ['scidash.account.auth.CsrfExemptSessionAuthentication', 'rest_framework_jwt.authentication.JSONWebTokenAuthentication'], 'DEFAULT_FILTER_BACKENDS': ['django_filters.rest_framework.DjangoFilterBackend']} REST_FRAMEWORK_CACHE = {'DEFAULT_CACHE_TIMEOUT': 86400} ROOT_URLCONF = 'scidash.main.urls' SCIDASH_APPS = ['scidash.sciunitmodels', 'scidash.sciunittests', 'scidash.general', 'scidash.account', 'scidash.logviewer'] SCIDASH_DEMO_USER_ID = None SCIDASH_INITIAL_SEARCH_QUARTERS = 12 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@localhost' 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.JSONSerializer' SETTINGS_MODULE = 'scidash.main.settings' SHORT_DATETIME_FORMAT = 'm/d/Y P' SHORT_DATE_FORMAT = 'm/d/Y' SIGNING_BACKEND = 'django.core.signing.TimestampSigner' SILENCED_SYSTEM_CHECKS = [] STATICFILES_DIRS = ['/app/scidash/static'] STATICFILES_FINDERS = ['django.contrib.staticfiles.finders.FileSystemFinder', 'django.contrib.staticfiles.finders.AppDirectoriesFinder'] STATICFILES_STORAGE = 'django.contrib.staticfiles.storage.StaticFilesStorage' STATIC_ROOT = None STATIC_URL = '/static/' TEMPLATES = [{'BACKEND': 'django.template.backends.django.DjangoTemplates', 'DIRS': ['/app/scidash/static'], 'APP_DIRS': True, 'OPTIONS': {'context_processors': ['django.template.context_processors.debug', 'django.template.context_processors.request', 'django.contrib.auth.context_processors.auth', 'django.contrib.messages.context_processors.messages']}}] TEMPLATE_DEBUG = True TEST_NON_SERIALIZED_APPS = [] TEST_RUNNER = 'django.test.runner.DiscoverRunner' THIRD_PARTY_APPS = ['pygeppetto_server', 'channels', 'rest_framework', 'django_extensions', 'django_filters', 'rest_framework_cache', 'material', 'django_celery_beat', 'django_celery_results', 'django_db_logger', 'ckeditor', 'adminsortable2'] 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 = False USE_X_FORWARDED_HOST = False USE_X_FORWARDED_PORT = False WSGI_APPLICATION = None X_FRAME_OPTIONS = 'SAMEORIGIN' YEAR_MONTH_FORMAT = 'F Y' You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard page generated by the handler for this status code.