切换工作界面报错 悬赏5积分

升级20.1.1后左下角切换工作界面报错

URL: /my.html
Fatal error: Uncaught Error: Attempt to assign property "gantt" on null in /apps/zentao/extension/custom/group/ext/lang/zh-cn/gantt.php:2 Stack trace: #0 /apps/zentao/framework/base/router.class.php(2998): include() #1 /apps/zentao/framework/router.class.php(137): baseRouter->loadLang('group', '') #2 /apps/zentao/module/project/config/dtable.php(285): router->loadLang('group') #3 /apps/zentao/framework/router.class.php(431): include('/apps/zentao/mo...') #4 /apps/zentao/module/my/config/table.php(16): router->loadModuleConfig('project') #5 /apps/zentao/framework/router.class.php(431): include('/apps/zentao/mo...') #6 /apps/zentao/framework/base/model.class.php(159): router->loadModuleConfig('my', '') #7 /apps/zentao/framework/base/router.class.php(2556): baseModel->__construct('') #8 /apps/zentao/framework/base/control.class.php(311): baseRouter->loadTarget('my', '') #9 /apps/zentao/framework/control.class.php(170): baseControl->loadModel('my') #10 /apps/zentao/framework/base/control.class.php(210): control->loadModel('my', '') #11 /apps/zentao/framework/control.class.php(34): baseControl->__construct('', '', '') #12 /apps/zentao/module/my/control.php(23): control->__construct('', '') #13 /apps/zentao/framework/base/router.class.php(1711): my->__construct() #14 /apps/zentao/framework/base/router.class.php(1778): baseRouter->getDefaultParams() #15 /apps/zentao/www/index.php(81): baseRouter->setParams() #16 {main} thrown in /apps/zentao/extension/custom/group/ext/lang/zh-cn/gantt.php on line 2