Navicat 连接 MySQL 报错 Authentication plugin 'caching_sha2_password' cannot be loaded

解决方法：
1.更新 user表的 host 为 '%'

update user set host ='%' where user =‘root’;

2.修改 密码规则

ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456';  # 修改密码

flush privileges;