验证插件问题的，管理员登录排查下:
use mysql;
SELECT `user`, `host`, `authentication_string`, `plugin` FROM mysql.user;
修复用户（请以实际为准）：
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'Qian123#';
ALTER USER 'xiyuan123'@'%' IDENTIFIED WITH mysql_native_password BY '[email protected]';