django admin.E408 admin.E409 admin.E410(must be in MIDDLEWARE in order to use the admin applicatio)

django 运行时提示下面的错误：
ERRORS:
?: (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.

找到 settings.py中的

1.将 MIDDLEWARE_CLASSES 改为 MIDDLEWARE  。

2.将  'django,contrib.auth.middleware.SessionAuthenticationMiddleware',  删除

如下图：