AssertionError at /api/v1/groups/295f9f05-0532-4d04-8432-208d041f7bf2/
Expected a `Response`, `HttpResponse` or `HttpStreamingResponse` to be returned from the view, but received a `<type 'NoneType'>`

Request Method: PATCH
Request URL: http://academy.local:8000/api/v1/groups/295f9f05-0532-4d04-8432-208d041f7bf2/
Django Version: 1.10.2
Python Executable: /Users/cryingjoker/.virtualenvs/academy2.7/bin/python
Python Version: 2.7.10
Python Path: ['/Users/cryingjoker/actionProjects/academy2', '/Users/cryingjoker/actionProjects/academy2/academy', '/Users/cryingjoker/actionProjects/academy2', '/Users/cryingjoker/.virtualenvs/academy2.7/lib/python27.zip', '/Users/cryingjoker/.virtualenvs/academy2.7/lib/python2.7', '/Users/cryingjoker/.virtualenvs/academy2.7/lib/python2.7/plat-darwin', '/Users/cryingjoker/.virtualenvs/academy2.7/lib/python2.7/plat-mac', '/Users/cryingjoker/.virtualenvs/academy2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/Users/cryingjoker/.virtualenvs/academy2.7/lib/python2.7/lib-tk', '/Users/cryingjoker/.virtualenvs/academy2.7/lib/python2.7/lib-old', '/Users/cryingjoker/.virtualenvs/academy2.7/lib/python2.7/lib-dynload', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/Users/cryingjoker/.virtualenvs/academy2.7/lib/python2.7/site-packages']
Server time: Wed, 12 Apr 2017 20:31:55 +0000
Installed Applications:
[u'django.contrib.admin',
 u'django.contrib.auth',
 u'django.contrib.contenttypes',
 u'django.contrib.sessions',
 u'django.contrib.messages',
 u'django.contrib.staticfiles',
 u'adminsortable2',
 u'djoser',
 u'rest_framework',
 u'academy.common.api',
 u'academy.common.core',
 u'academy.common.user_auth',
 u'academy.common.utils',
 u'academy.features.dialogue_lessons',
 u'academy.features.downloadable_lessons',
 u'academy.features.graphic_lessons',
 u'academy.features.test_lessons',
 u'academy.features.text_lessons',
 u'academy.features.video_lessons',
 u'academy.features.video_test_lessons',
 u'academy.features.notifications',
 u'academy.features.badges_notifications',
 u'academy.features.ideas_notifications',
 u'academy.features.badges',
 u'academy.features.ideas']
Installed Middleware:
[u'django.middleware.security.SecurityMiddleware',
 u'django.contrib.sessions.middleware.SessionMiddleware',
 u'django.middleware.common.CommonMiddleware',
 u'django.middleware.csrf.CsrfViewMiddleware',
 u'django.contrib.auth.middleware.AuthenticationMiddleware',
 u'django.contrib.messages.middleware.MessageMiddleware',
 u'django.middleware.clickjacking.XFrameOptionsMiddleware']


Traceback:

File "/Users/cryingjoker/.virtualenvs/academy2.7/lib/python2.7/site-packages/django/core/handlers/exception.py" in inner
  39.             response = get_response(request)

File "/Users/cryingjoker/.virtualenvs/academy2.7/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
  187.                 response = self.process_exception_by_middleware(e, request)

File "/Users/cryingjoker/.virtualenvs/academy2.7/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
  185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/Users/cryingjoker/.virtualenvs/academy2.7/lib/python2.7/site-packages/django/views/decorators/csrf.py" in wrapped_view
  58.         return view_func(*args, **kwargs)

File "/Users/cryingjoker/.virtualenvs/academy2.7/lib/python2.7/site-packages/rest_framework/viewsets.py" in view
  87.             return self.dispatch(request, *args, **kwargs)

File "/Users/cryingjoker/.virtualenvs/academy2.7/lib/python2.7/site-packages/rest_framework/views.py" in dispatch
  476.         self.response = self.finalize_response(request, response, *args, **kwargs)

File "/Users/cryingjoker/.virtualenvs/academy2.7/lib/python2.7/site-packages/rest_framework/views.py" in finalize_response
  396.             % type(response)

Exception Type: AssertionError at /api/v1/groups/295f9f05-0532-4d04-8432-208d041f7bf2/
Exception Value: Expected a `Response`, `HttpResponse` or `HttpStreamingResponse` to be returned from the view, but received a `<type 'NoneType'>`
Request information:
USER: admin

GET: No GET data

POST: No POST data

FILES: No FILES data

COOKIES:
tabstyle = 'raw-tab'
csrftoken = 'PWq9HNk4nm8cYDsxETLoDVdLkQaW2Oy2gekyzwqbIKdSFVNNVrYjAZBhkv6AkOvA'
sessionid = 'g8aapookqbgns3c9xgej5039k5o56x38'
_ga = 'GA1.2.98176637.1484076598'

META:
Apple_PubSub_Socket_Render = '/private/tmp/com.apple.launchd.sPwt9oNBXI/Render'
COMMAND_MODE = 'unix2003'
CONTENT_LENGTH = '14'
CONTENT_TYPE = 'application/x-www-form-urlencoded; charset=UTF-8'
CSRF_COOKIE = 'PWq9HNk4nm8cYDsxETLoDVdLkQaW2Oy2gekyzwqbIKdSFVNNVrYjAZBhkv6AkOvA'
DJANGO_SETTINGS_MODULE = 'academy.site.settings'
GATEWAY_INTERFACE = 'CGI/1.1'
HOME = '/Users/cryingjoker'
HTTP_ACCEPT = '*/*'
HTTP_ACCEPT_ENCODING = 'gzip, deflate, sdch'
HTTP_ACCEPT_LANGUAGE = 'ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4'
HTTP_CACHE_CONTROL = 'no-cache'
HTTP_CONNECTION = 'keep-alive'
HTTP_COOKIE = '_ga=GA1.2.98176637.1484076598; sessionid=g8aapookqbgns3c9xgej5039k5o56x38; tabstyle=raw-tab; csrftoken=PWq9HNk4nm8cYDsxETLoDVdLkQaW2Oy2gekyzwqbIKdSFVNNVrYjAZBhkv6AkOvA'
HTTP_HOST = 'academy.local:8000'
HTTP_ORIGIN = 'http://academy.local:8000'
HTTP_PRAGMA = 'no-cache'
HTTP_REFERER = 'http://academy.local:8000/users/list/295f9f05-0532-4d04-8432-208d041f7bf2/edit'
HTTP_USER_AGENT = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36'
HTTP_X_COMPRESS = 'null'
HTTP_X_CSRFTOKEN = 'PWq9HNk4nm8cYDsxETLoDVdLkQaW2Oy2gekyzwqbIKdSFVNNVrYjAZBhkv6AkOvA'
HTTP_X_REQUESTED_WITH = 'XMLHttpRequest'
LC_CTYPE = 'ru_RU.UTF-8'
LOGNAME = 'cryingjoker'
PATH = '/Users/cryingjoker/.virtualenvs/academy2.7/bin:/usr/bin:/bin:/usr/sbin:/sbin'
PATH_INFO = u'/api/v1/groups/295f9f05-0532-4d04-8432-208d041f7bf2/'
PS1 = '(academy2.7) '
PWD = '/Users/cryingjoker/actionProjects/academy2'
PYCHARM_HOSTED = '1'
PYTHONIOENCODING = 'UTF-8'
PYTHONPATH = '/Users/cryingjoker/actionProjects/academy2'
PYTHONUNBUFFERED = '1'
QUERY_STRING = ''
REMOTE_ADDR = '127.0.0.1'
REMOTE_HOST = ''
REQUEST_METHOD = 'PATCH'
RUN_MAIN = 'true'
SCRIPT_NAME = u''
SECURITYSESSIONID = '186a5'
SERVER_NAME = '1.0.0.127.in-addr.arpa'
SERVER_PORT = '8000'
SERVER_PROTOCOL = 'HTTP/1.1'
SERVER_SOFTWARE = 'WSGIServer/0.1 Python/2.7.10'
SHELL = '/bin/bash'
SSH_AUTH_SOCK = '/private/tmp/com.apple.launchd.aTbSiploo4/Listeners'
TMPDIR = '/var/folders/nj/l5p1pt_x4vjdw739tysypzm00000gn/T/'
TZ = u'UTC'
USER = 'cryingjoker'
VERSIONER_PYTHON_PREFER_32_BIT = 'no'
VERSIONER_PYTHON_VERSION = '2.7'
VIRTUAL_ENV = '/Users/cryingjoker/.virtualenvs/academy2.7'
XPC_FLAGS = '0x0'
XPC_SERVICE_NAME = '0'
__CF_USER_TEXT_ENCODING = '0x1F5:0x7:0x31'
wsgi.errors = <open file '<stderr>', mode 'w' at 0x10dad21e0>
wsgi.file_wrapper = ''
wsgi.input = <socket._fileobject object at 0x10fcec750>
wsgi.multiprocess = False
wsgi.multithread = True
wsgi.run_once = False
wsgi.url_scheme = 'http'
wsgi.version =

Settings:
Using settings module academy.site.settings
ABSOLUTE_URL_OVERRIDES = {}
ADMINS = (u'\u0410lex Nikolaev', u'cryingjoker@me.com')
ALLOWED_HOSTS = []
APPEND_SLASH = True
AUTHENTICATION_BACKENDS =
AUTH_PASSWORD_VALIDATORS = u'********************'
AUTH_USER_MODEL = u'user_auth.User'
BASE_DIR = '/Users/cryingjoker/actionProjects/academy2/academy'
CACHES = {u'default': {u'BACKEND': u'django.core.cache.backends.locmem.LocMemCache'}}
CACHE_MIDDLEWARE_ALIAS = u'default'
CACHE_MIDDLEWARE_KEY_PREFIX = u'********************'
CACHE_MIDDLEWARE_SECONDS = 600
CKEDITOR_CONFIGS = {u'default': {u'contentsCss': u'/static/frontoffice/css/style.css', u'format_tags': u'p;h1;h2', u'toolbar_academy': [[u'Format', u'Source'], [u'Cut', u'Copy', u'Paste', u'-', u'Undo', u'Redo'], [u'Bold', u'Italic', u'Underline'], [u'NumberedList', u'BulletedList', u'-', u'Indent', u'Outdent', u'-', u'JustifyLeft', u'JustifyCenter', u'JustifyRight', u'JustifyBlock'], [u'Find', u'Replace', u'-', u'SelectAll'], [u'Link', u'Unlink', u'-', u'Image', u'Table'], [u'Maximize']], u'toolbar': u'academy'}}
CKEDITOR_UPLOAD_PATH = u'uploads/'
CSRF_COOKIE_AGE = 31449600
CSRF_COOKIE_DOMAIN = None
CSRF_COOKIE_HTTPONLY = False
CSRF_COOKIE_NAME = u'csrftoken'
CSRF_COOKIE_PATH = u'/'
CSRF_COOKIE_SECURE = False
CSRF_FAILURE_VIEW = u'django.views.csrf.csrf_failure'
CSRF_HEADER_NAME = u'HTTP_X_CSRFTOKEN'
CSRF_TRUSTED_ORIGINS = []
DATABASES = {u'default': {u'ENGINE': u'django.db.backends.postgresql_psycopg2', 'AUTOCOMMIT': True, 'ATOMIC_REQUESTS': False, u'NAME': u'academy2', 'CONN_MAX_AGE': 0, 'TIME_ZONE': None, u'PORT': u'', u'HOST': u'127.0.0.1', 'USER': '', 'TEST': {'COLLATION': None, 'CHARSET': None, 'NAME': None, 'MIRROR': None}, 'PASSWORD': u'********************', 'OPTIONS': {}}}
DATABASE_ROUTERS = []
DATA_UPLOAD_MAX_MEMORY_SIZE = 2621440
DATA_UPLOAD_MAX_NUMBER_FIELDS = 1000
DATETIME_FORMAT = u'N j, Y, P'
DATETIME_FORMAT_JSON = u'%Y-%m-%dT%H:%M:%SZ'
DATETIME_FORMAT_READABLE = u'%Y-%m-%d %H:%M:%S'
DATETIME_INPUT_FORMATS = [u'%Y-%m-%d %H:%M:%S', u'%Y-%m-%d %H:%M:%S.%f', u'%Y-%m-%d %H:%M', u'%Y-%m-%d', u'%m/%d/%Y %H:%M:%S', u'%m/%d/%Y %H:%M:%S.%f', u'%m/%d/%Y %H:%M', u'%m/%d/%Y', u'%m/%d/%y %H:%M:%S', u'%m/%d/%y %H:%M:%S.%f', u'%m/%d/%y %H:%M', u'%m/%d/%y']
DATE_FORMAT = u'N j, Y'
DATE_FORMAT_JSON = u'%Y-%m-%d'
DATE_FORMAT_JSON_REVERSE = u'%d-%m-%Y'
DATE_INPUT_FORMATS = [u'%Y-%m-%d', u'%m/%d/%Y', u'%m/%d/%y', u'%b %d %Y', u'%b %d, %Y', u'%d %b %Y', u'%d %b, %Y', u'%B %d %Y', u'%B %d, %Y', u'%d %B %Y', u'%d %B, %Y']
DEBUG = True
DEBUG_PROPAGATE_EXCEPTIONS = False
DECIMAL_SEPARATOR = u'.'
DEFAULT_CHARSET = u'utf-8'
DEFAULT_CONTENT_TYPE = u'text/html'
DEFAULT_EXCEPTION_REPORTER_FILTER = u'django.views.debug.SafeExceptionReporterFilter'
DEFAULT_FILE_STORAGE = u'django.core.files.storage.FileSystemStorage'
DEFAULT_FROM_EMAIL = u'Academy <robot@academy.local>'
DEFAULT_INDEX_TABLESPACE = u''
DEFAULT_TABLESPACE = u''
DISALLOWED_USER_AGENTS = []
DJOSER = {u'SITE_NAME': u'Academy', u'ACTIVATION_URL': u'#/{uid}/{token}', u'PASSWORD_RESET_CONFIRM_URL': u'********************', u'SEND_ACTIVATION_EMAIL': True}
EMAIL_BACKEND = u'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST = u'smtp.sendgrid.net'
EMAIL_HOST_PASSWORD = u'********************'
EMAIL_HOST_USER = u'FLTest'
EMAIL_PORT = 587
EMAIL_SSL_CERTFILE = None
EMAIL_SSL_KEYFILE = u'********************'
EMAIL_SUBJECT_PREFIX = u'[Academy Django] '
EMAIL_TIMEOUT = None
EMAIL_USE_SSL = False
EMAIL_USE_TLS = True
FILE_CHARSET = u'utf-8'
FILE_UPLOAD_DIRECTORY_PERMISSIONS = None
FILE_UPLOAD_HANDLERS = [u'django.core.files.uploadhandler.MemoryFileUploadHandler', u'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
GITLAB_API_VERSION = u'********************'
GITLAB_BASE_URL = u'https://gitlab.glmp.me/'
GITLAB_PROJECT_ID = 108
GITLAB_TOKEN = u'********************'
IGNORABLE_404_URLS = []
INSTALLED_APPS = [u'django.contrib.admin', u'django.contrib.auth', u'django.contrib.contenttypes', u'django.contrib.sessions', u'django.contrib.messages', u'django.contrib.staticfiles', u'adminsortable2', u'djoser', u'rest_framework', u'academy.common.api', u'academy.common.core', u'academy.common.user_auth', u'academy.common.utils', u'academy.features.dialogue_lessons', u'academy.features.downloadable_lessons', u'academy.features.graphic_lessons', u'academy.features.test_lessons', u'academy.features.text_lessons', u'academy.features.video_lessons', u'academy.features.video_test_lessons', u'academy.features.notifications', u'academy.features.badges_notifications', u'academy.features.ideas_notifications', u'academy.features.badges', u'academy.features.ideas']
INTERNAL_IPS = u'127.0.0.1'
LANGUAGES =
LANGUAGES_BIDI = [u'he', u'ar', u'fa', u'ur']
LANGUAGE_CODE = u'en'
LANGUAGE_COOKIE_AGE = None
LANGUAGE_COOKIE_DOMAIN = None
LANGUAGE_COOKIE_NAME = u'django_language'
LANGUAGE_COOKIE_PATH = u'/'
LOCALE_PATHS = u'/Users/cryingjoker/actionProjects/academy2/academy/locale'
LOGGING = {u'loggers': {u'': {u'handlers': [u'academy_debug_log_file', u'academy_error_log_file'], u'propagate': True, u'level': u'DEBUG'}, u'academy': {u'handlers': [u'console'], u'propagate': True, u'level': u'DEBUG'}, u'tests': {u'handlers': [u'console_tests'], u'propagate': True, u'level': u'INFO'}, u'django.request': {u'handlers': [u'mail_admins'], u'propagate': True, u'level': u'ERROR'}, u'django.db.backends': {u'handlers': [u'console'], u'propagate': True, u'level': u'WARNING'}}, u'disable_existing_loggers': True, u'handlers': {u'academy_debug_log_file': {u'backupCount': 25, u'level': u'DEBUG', u'filename': u'logs/academy-debug.log', u'formatter': u'standard', u'class': u'logging.handlers.RotatingFileHandler', u'maxBytes': 1048576}, u'console': {u'formatter': u'verbose', u'class': u'logging.StreamHandler', u'level': u'DEBUG'}, u'console_tests': {u'formatter': u'simple', u'class': u'logging.StreamHandler', u'level': u'INFO'}, u'academy_error_log_file': {u'backupCount': 25, u'level': u'ERROR', u'filename': u'logs/academy-error.log', u'formatter': u'standard', u'class': u'logging.handlers.RotatingFileHandler', u'maxBytes': 1048576}, u'mail_admins': {u'class': u'django.utils.log.AdminEmailHandler', u'filters': [u'require_debug_false', u'skip_suspicious_operations'], u'level': u'ERROR'}}, u'formatters': {u'simple': {u'format': u'%(levelname)s %(message)s'}, u'verbose': {u'format': u'%(levelname)s %(asctime)s %(module)s %(process)d %(thread)d %(message)s'}, u'standard': {u'format': u'%(asctime)s [%(levelname)s] %(name)s: %(message)s'}}, u'version': 1, u'filters': {u'require_debug_false': {u'()': u'django.utils.log.RequireDebugFalse'}, u'skip_suspicious_operations': {u'callback': <function skip_suspicious_operations at 0x10e858488>, u'()': u'django.utils.log.CallbackFilter'}}}
LOGGING_CONFIG = u'logging.config.dictConfig'
LOGIN_REDIRECT_URL = u'/accounts/profile/'
LOGIN_URL = u'/accounts/login/'
LOGOUT_REDIRECT_URL = None
MANAGERS = (u'\u0410lex Nikolaev', u'cryingjoker@me.com')
MANDRILL_X_MC_TRACK_HEADER = u'none'
MEDIA_ROOT = u'/Users/cryingjoker/actionProjects/academy2/academy/media'
MEDIA_URL = u'/media/'
MESSAGE_STORAGE = u'django.contrib.messages.storage.fallback.FallbackStorage'
MIDDLEWARE = [u'django.middleware.security.SecurityMiddleware', u'django.contrib.sessions.middleware.SessionMiddleware', u'django.middleware.common.CommonMiddleware', u'django.middleware.csrf.CsrfViewMiddleware', u'django.contrib.auth.middleware.AuthenticationMiddleware', u'django.contrib.messages.middleware.MessageMiddleware', u'django.middleware.clickjacking.XFrameOptionsMiddleware']
MIDDLEWARE_CLASSES = [u'django.middleware.common.CommonMiddleware', u'django.middleware.csrf.CsrfViewMiddleware']
MIGRATION_MODULES = {}
MONTH_DAY_FORMAT = u'F j'
NUMBER_GROUPING = 0
PASSWORD_HASHERS = u'********************'
PASSWORD_RESET_TIMEOUT_DAYS = u'********************'
PREPEND_WWW = False
PROJECT_BASE_URL = u'http://academy.local:8000'
PROJECT_PATH = '/Users/cryingjoker/actionProjects/academy2/academy'
REST_FRAMEWORK = {u'DEFAULT_AUTHENTICATION_CLASSES': [u'rest_framework.authentication.SessionAuthentication'], u'DEFAULT_PERMISSION_CLASSES': [u'rest_framework.permissions.IsAuthenticated'], u'PAGE_SIZE': 1000}
ROOT_URLCONF = u'academy.site.urls'
SECRET_KEY = u'********************'
SECURE_BROWSER_XSS_FILTER = False
SECURE_CONTENT_TYPE_NOSNIFF = False
SECURE_HSTS_INCLUDE_SUBDOMAINS = False
SECURE_HSTS_SECONDS = 0
SECURE_PROXY_SSL_HEADER = None
SECURE_REDIRECT_EXEMPT = []
SECURE_SSL_HOST = None
SECURE_SSL_REDIRECT = False
SERVER_EMAIL = u'Academy <robot@academy.local>'
SESSION_CACHE_ALIAS = u'default'
SESSION_COOKIE_AGE = 1209600
SESSION_COOKIE_DOMAIN = None
SESSION_COOKIE_HTTPONLY = True
SESSION_COOKIE_NAME = u'sessionid'
SESSION_COOKIE_PATH = u'/'
SESSION_COOKIE_SECURE = False
SESSION_ENGINE = u'django.contrib.sessions.backends.db'
SESSION_EXPIRE_AT_BROWSER_CLOSE = False
SESSION_FILE_PATH = None
SESSION_SAVE_EVERY_REQUEST = False
SESSION_SERIALIZER = u'django.contrib.sessions.serializers.JSONSerializer'
SETTINGS_MODULE = 'academy.site.settings'
SHORT_DATETIME_FORMAT = u'm/d/Y P'
SHORT_DATE_FORMAT = u'm/d/Y'
SIGNING_BACKEND = u'django.core.signing.TimestampSigner'
SILENCED_SYSTEM_CHECKS = []
STATICFILES_DIRS = []
STATICFILES_FINDERS =
STATICFILES_STORAGE = u'django.contrib.staticfiles.storage.StaticFilesStorage'
STATIC_ROOT = u'/Users/cryingjoker/actionProjects/academy2/static'
STATIC_URL = u'/static/'
TEMPLATES = [{u'APP_DIRS': True, u'OPTIONS': {u'context_processors': [u'django.template.context_processors.debug', u'django.template.context_processors.request', u'django.contrib.auth.context_processors.auth', u'django.contrib.messages.context_processors.messages', u'academy.common.utils.context_processors.base']}, u'BACKEND': u'django.template.backends.django.DjangoTemplates'}]
TEST_NON_SERIALIZED_APPS = []
TEST_RUNNER = u'django.test.runner.DiscoverRunner'
THOUSAND_SEPARATOR = u','
THUMBNAIL_ALTERNATIVE_RESOLUTIONS = [2, 3]
THUMBNAIL_FORMAT = u'PNG'
THUMBNAIL_QUALITY = 100
TIME_FORMAT = u'P'
TIME_INPUT_FORMATS = [u'%H:%M:%S', u'%H:%M:%S.%f', u'%H:%M']
TIME_ZONE = u'UTC'
USE_ETAGS = False
USE_I18N = True
USE_L10N = True
USE_THOUSAND_SEPARATOR = False
USE_TZ = True
USE_X_FORWARDED_HOST = False
USE_X_FORWARDED_PORT = False
WSGI_APPLICATION = u'academy.site.wsgi.application'
X_FRAME_OPTIONS = u'SAMEORIGIN'
YEAR_MONTH_FORMAT = u'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.