升级后访问不了，页面出不来已解决 悬赏5积分

16:35:01 ERROR: SQLSTATE[HY000] [2054] The server requested authentication method unknown to the client in E:\xampp\zentao\framework\base\router.class.php on line 2173, last called by E:\xampp\zentao\framework\base\router.class.php on line 2124 through function connectByPDO.
in E:\xampp\zentao\framework\base\router.class.php on line 2228 when visiting

有这个错误提示