解决方法

1. settings.py中配置ALLOWED_HOSTS，结果如下：

   ALLOWED_HOSTS = ['*']
   

2. settings.py中配置MIDDLEWARE，注释XFrameOptionsMiddleware，结果如下：

   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', # 注释这一条
   ]