Mysql 8.0 Navicat连接Mysql报错Authentication plugin ‘caching_sha2_password‘ cannot be loaded

1、终端登陆MySQL
$ mysql -u root -p
password #登入mysql

2、修改账户密码加密规则并更新用户密码
ALTER USER 'root'@'localhost' IDENTIFIED BY '123456' PASSWORD EXPIRE NEVER; #修改加密规则
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456'; #更新一下用户的密码

3、刷新权限并重置密码
FLUSH PRIVILEGES; #刷新权限
4、再重置下密码：
alter user 'root'@'localhost' identified by '123456';