Lỗi ErrorException: Undefined index: default_sort_order

Server Error Log của mình thế này:

ErrorException: Undefined index: default_sort_order - library/XenForo/ControllerPublic/Forum.php:291
Generated By: Admin, Hôm nay lúc 04:40
Stack Trace
Request State

Mã:

#0 /home/ffffsfnfjhj/domains/vfubook.com/public_html/library/XenForo/ControllerPublic/Forum.php(291): XenForo_Application::handlePhpError(8, 'Undefined index...', '/home/kghkk/...', 291, Array) #1 /home/kghkk/domains/vfubook.com/public_html/library/XenForo/ControllerPublic/Forum.php(102): XenForo_ControllerPublic_Forum->_getDefaultThreadSort(Array) #2 /home/tkghkk/domains/vfubook.com/public_html/library/EWRporta/ControllerPublic/Forum.php(23): XenForo_ControllerPublic_Forum->actionForum() #3 /home/kghkkotl/domains/vfubook.com/public_html/library/XenForo/FrontController.php(337): EWRporta_ControllerPublic_Forum->actionForum() #4 /home/kghkk/domains/vfubook.com/public_html/library/XenForo/FrontController.php(134): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch)) #5 /home/kghkk/domains/vfubook.com/public_html/index.php(13): XenForo_FrontController->run() #6 {main}
    Request State  
array(3) { ["url"] => string(43) "http://vfubook.com/forums/thiet-ke-website/" ["_GET"] => array(0) { } ["_POST"] => array(0) { } } 

 

có phải dùng customs url nên k có Id trong link forum mới bị k vậy nhỉ
Bác @Alucar giúp e với