还原备份文件后，登录无反应已解决 悬赏5积分

查看的错误提示如下：

thrown in E:\ZenTao\app\zentao\lib\base\dao\dao.class.php on line 890

[15-Jan-2024 18:26:24 Asia/Shanghai] PHP Fatal error:  Uncaught Error: Call to a member function fetch() on null in E:\ZenTao\app\zentao\lib\base\dao\dao.class.php:890
Stack trace:
#0 E:\ZenTao\app\zentao\module\user\model.php(2061): baseDAO->fetch()
#1 E:\ZenTao\app\zentao\module\common\model.php(292): userModel->grantUserView('guest', Array)
#2 E:\ZenTao\app\zentao\module\common\model.php(30): commonModel->setUser()
#3 E:\ZenTao\app\zentao\framework\base\router.class.php(1470): commonModel->__construct()
#4 E:\ZenTao\app\zentao\roadrunner\consumer.php(30): baseRouter->loadCommon()
#5 {main}