'WSGIRequest' object has no attribute 'user' Django admin

When I trying to access the admin page it gives me the following error:

    System check identified no issues (0 silenced).
    June 21, 2016 - 15:26:14
    Django version 1.9.7, using settings 'librato_chart_sender_web.settings'
    Starting development server at http://127.0.0.1:8000/
    Quit the server with CONTROL-C.
    Internal Server Error: /admin/
    Traceback (most recent call last):
      File "/Library/Python/2.7/site-packages/django/core/handlers/base.py", line 149, in get_response
        response = self.process_exception_by_middleware(e, request)
      File "/Library/Python/2.7/site-packages/django/core/handlers/base.py", line 147, in get_response
        response = wrapped_callback(request, *callback_args, **callback_kwargs)
      File "/Library/Python/2.7/site-packages/django/contrib/admin/sites.py", line 265, in wrapper
        return self.admin_view(view, cacheable)(*args, **kwargs)
      File "/Library/Python/2.7/site-packages/django/utils/decorators.py", line 149, in _wrapped_view
        response = view_func(request, *args, **kwargs)
      File "/Library/Python/2.7/site-packages/django/views/decorators/cache.py", line 57, in _wrapped_view_func
        response = view_func(request, *args, **kwargs)
      File "/Library/Python/2.7/site-packages/django/contrib/admin/sites.py", line 233, in inner
        if not self.has_permission(request):
      File "/Library/Python/2.7/site-packages/django/contrib/admin/sites.py", line 173, in has_permission
        return request.user.is_active and request.user.is_staff
    AttributeError: 'WSGIRequest' object has no attribute 'user'
    [21/Jun/2016 15:26:18] "GET /admin/ HTTP/1.1" 500 78473

Im quite new in django ... but I followed this tutorial: https://docs.djangoproject.com/en/1.9/ref/contrib/admin/

I dont have any custom AdminSites and custom AdminModels.

I already googled about this problem but still I cannot solve it for my case in any way. Can you help ?

here is my settings.py:

    """
    Django settings for librato_chart_sender_web project.

    Generated by 'django-admin startproject' using Django 1.11.dev20160523235928.

    For more information on this file, see
    https://docs.djangoproject.com/en/dev/topics/settings/

    For the full list of settings and their values, see
    https://docs.djangoproject.com/en/dev/ref/settings/
    """

    import os

    # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
    BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))


    # Quick-start development settings - unsuitable for production
    # See https://docs.djangoproject.com/en/dev/howto/deployment/checklist/

    # SECURITY WARNING: keep the secret key used in production secret!
    SECRET_KEY = '*[email protected]+=wzrqx^6$9z&@[email protected](w$js+ktw45lv2skez(=kz+rwff_'

    # SECURITY WARNING: don't run with debug turned on in production!
    DEBUG = True

    ALLOWED_HOSTS = []


    # Application definition

    INSTALLED_APPS = [
        'django.contrib.admin',
        'librato_chart_sender',
        'fontawesome',
        'django.contrib.auth',
        'django.contrib.contenttypes',
        'django.contrib.sessions',
        'django.contrib.messages',
        'django.contrib.staticfiles',
    ]

    MIDDLEWARE = [
        'django.middleware.security.SecurityMiddleware',
        'django.contrib.sessions.middleware.SessionMiddleware',
        'django.middleware.common.CommonMiddleware',
        'django.middleware.csrf.CsrfViewMiddleware',
        'django.contrib.auth.middleware.AuthenticationMiddleware',
        'django.contrib.messages.middleware.MessageMiddleware',
        'django.middleware.clickjacking.XFrameOptionsMiddleware',
    ]

    ROOT_URLCONF = 'librato_chart_sender_web.urls'

    TEMPLATES = [
        {
            'BACKEND': 'django.template.backends.django.DjangoTemplates',
            'DIRS': [os.path.join(BASE_DIR, 'librato_chart_sender/templates')],
            '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',
                ],
            },
        },
    ]

    WSGI_APPLICATION = 'librato_chart_sender_web.wsgi.application'


    # Database
    # https://docs.djangoproject.com/en/dev/ref/settings/#databases

    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.sqlite3',
            'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
        }
    }


    # Password validation
    # https://docs.djangoproject.com/en/dev/ref/settings/#auth-password-validators

    AUTH_PASSWORD_VALIDATORS = [
        {
            'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
        },
        {
            'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
        },
        {
            'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
        },
        {
            'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
        },
    ]


    # Internationalization
    # https://docs.djangoproject.com/en/dev/topics/i18n/

    LANGUAGE_CODE = 'en-us'

    TIME_ZONE = 'GMT'

    USE_I18N = True

    USE_L10N = True

    USE_TZ = True


    # Static files (CSS, JavaScript, Images)
    # https://docs.djangoproject.com/en/dev/howto/static-files/

    STATIC_URL = '/static/'
    STATICFILES_DIRS = [
        ('css', 'librato_chart_sender/static/css'),
        ('js', 'librato_chart_sender/static/js'),
        ('fonts', 'librato_chart_sender/static/fonts'),
    ]

and admin.py:

    from django.contrib import admin
    from .models import Configuration

    # Register your models here.

    admin.site.register(Configuration)

To resolve this go to settings.py where there is new-style MIDDLEWARE (introduced in Django 1.10)

Change that to old-style MIDDLEWARE_CLASSES

https://docs.djangoproject.com/en/stable/topics/http/middleware/#upgrading-pre-django-1-10-style-middleware

From: stackoverflow.com/q/37949198