• This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn more.

ErrorException: Undefined index: XF1.2 RC1


Active member
get some error on view thread.

ErrorException: Undefined index: default_sort_order - library/XenForo/ControllerPublic/Forum.php:291

#0 /srv/www/domain.com/public_html/library/XenForo/ControllerPublic/Forum.php(291): XenForo_Application::handlePhpError(8, 'Undefined index...', '/srv/www/...', 291, Array)
#1 /srv/www/domain.com/public_html/library/XenForo/ControllerPublic/Forum.php(102): XenForo_ControllerPublic_Forum->_getDefaultThreadSort(Array)
#2 /srv/www/domain.com/public_html/library/XenForo/FrontController.php(337): XenForo_ControllerPublic_Forum->actionForum()
#3 /srv/www/domain.com/public_html/library/XenForo/FrontController.php(134): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch))
#4 /srv/www/domain.com/public_html/index.php(13): XenForo_FrontController->run()
#5 {main}

array(3) {
["url"] => string(42) "http://domain.com/forums/test.3/"
["_GET"] => array(1) {
["/forums/test_3/"] => string(0) ""
["_POST"] => array(0) {


XenForo developer
Staff member
This is likely an error with your upgrade. You should've seen an error message after completing the upgrade about this.


XenForo developer
Staff member
Ahh, the CLI doesn't do that check. If you reimport the master data from the web interface it should show you the problems. These are add-on conflicts and really need to be resolved before upgrading.