我终于找到了。

显然，升级到MySQL 5.6后有一些不兼容问题。

Apparently, there were some incompatibility issues after upgrading to MySQL 5.6.

为了检查这些问题并修复它们，您将需要执行MySQL升级。

In order to check for such issues and fix them, you will need to do a MySQL Upgrade.

只需在终端上运行以下命令：

Just run the following on a terminal:

mysql_upgrade -u root -p

输入您的密码，等待升级完成。

Enter your password, and wait until the upgrade finishes.

这解决了我的问题。