title: Django E.408, E.409 and E.410 errors on runserver
body: <p>I am installing a new Django project using virtualenv, all in the normal way. My version of Python is 3.7.3, and django is 2.2.3. </p>
  
  <p>If I do python manage.py runserver, I get the following errors:</p>
  
  <pre><code>?: (admin.E408)'django.contrib.auth.middleware.AuthenticationMiddleware' must be in MIDDLEWARE in order to use the admin application.
  ?: (admin.E409) 'django.contrib.messages.middleware.MessageMiddleware' must be in MIDDLEWARE in order to use the admin application.
  ?: (admin.E410) 'django.contrib.sessions.middleware.SessionMiddleware' must be in MIDDLEWARE in order to use the admin application.
  </code></pre>
  
  <p>Here is my settings.py, and you can see that those middleware are there. </p>
  
  <pre><code>"""
  Django settings for fcc_new project.
  
  Generated by 'django-admin startproject' using Django 1.9.4.
  
  For more information on this file, see
  https://docs.djangoproject.com/en/1.9/topics/settings/
  
  For the full list of settings and their values, see
  https://docs.djangoproject.com/en/1.9/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/1.9/howto/deployment/checklist/
  
  # SECURITY WARNING: keep the secret key used in production secret!
  SECRET_KEY = MY KEY goes here
  
  # SECURITY WARNING: don't run with debug turned on in production!
  DEBUG = True
  
  ALLOWED_HOSTS = []
  
  
  # Application definition
  
  INSTALLED_APPS = [
      'django.contrib.admin',
      'django.contrib.auth',
      'django.contrib.contenttypes',
      'django.contrib.sessions',
      'django.contrib.messages',
      'django.contrib.staticfiles',
  ]
  
  MIDDLEWARE_CLASSES = [
      'django.middleware.security.SecurityMiddleware',
      'django.contrib.sessions.middleware.SessionMiddleware',
      'django.middleware.common.CommonMiddleware',
      'django.middleware.csrf.CsrfViewMiddleware',
      'django.contrib.auth.middleware.AuthenticationMiddleware',
      'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
      'django.contrib.messages.middleware.MessageMiddleware',
      'django.middleware.clickjacking.XFrameOptionsMiddleware',
  ]
  
  ROOT_URLCONF = 'fcc_new.urls'
  
  TEMPLATES = [
      {
          'BACKEND': 'django.template.backends.django.DjangoTemplates',
          'DIRS': [],
          '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 = 'fcc_new.wsgi.application'
  
  
  # Database
  # https://docs.djangoproject.com/en/1.9/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/1.9/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/1.9/topics/i18n/
  
  LANGUAGE_CODE = 'en-us'
  
  TIME_ZONE = 'UTC'
  
  USE_I18N = True
  
  USE_L10N = True
  
  USE_TZ = True
  
  
  # Static files (CSS, JavaScript, Images)
  # https://docs.djangoproject.com/en/1.9/howto/static-files/
  
  STATIC_URL = '/static/'
  </code></pre>
  
  <p>I've tried reinstalling, checking versions, and changing 'MIDDLEWARE_CLASSES' to 'MIDDLEWARE'. Nothing is working. Can anyone identify the problem?</p>