WCF::handleException() Unhandled exception: Call to a member function getGroupedObjects() on null

#0 /usr/www/users/virtuecn/wbbneu1/wcf/lib/system/event/EventHandler.class.php(221): wbb\system\event\listener\TeraliosBBCodeListener->execute(Object(wbb\page\ThreadPage), 'wbb\\page\\Thread...', 'assignVariables')
#1 /usr/www/users/virtuecn/wbbneu1/wcf/lib/page/AbstractPage.class.php(127): wcf\system\event\EventHandler->fireAction(Object(wbb\page\ThreadPage), 'assignVariables')
#2 /usr/www/users/virtuecn/wbbneu1/wcf/lib/page/MultipleLinkPage.class.php(219): wcf\page\AbstractPage->assignVariables()
#3 /usr/www/users/virtuecn/wbbneu1/lib/page/ThreadPage.class.php(309): wcf\page\MultipleLinkPage->assignVariables()
#4 /usr/www/users/virtuecn/wbbneu1/wcf/lib/page/AbstractPage.class.php(276): wbb\page\ThreadPage->assignVariables()
#5 /usr/www/users/virtuecn/wbbneu1/wcf/lib/page/AbstractPage.class.php(100): wcf\page\AbstractPage->show()
#6 /usr/www/users/virtuecn/wbbneu1/wcf/lib/system/request/Request.class.php(58): wcf\page\AbstractPage->__run()
#7 /usr/www/users/virtuecn/wbbneu1/wcf/lib/system/request/RequestHandler.class.php(139): wcf\system\request\Request->execute()
#8 /usr/www/users/virtuecn/wbbneu1/index.php(10): wcf\system\request\RequestHandler->handle('wbb')
#9 {main}