我有 Django 1.9
我按照此说明安装了 allauth 。但运行迁移后出现以下错误：
./manage.py migrate
错误：
...
RuntimeError: Model class allauth.account.models.EmailAddress doesn't declare an explicit app_label and either isn't in an application in INSTALLED_APPS or else was imported before its application was loaded.
请帮我解决这个问题。