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

#0 /var/www/vhosts/s666.fsb.ru/freesoft-board.to/fsbwbb/lib/system/user/activity/event/LikeablePostUserActivityEvent.class.php(57): wbb\data\post\Post->canRead()
#1 /var/www/vhosts/s666.fsb.ru/freesoft-board.to/fsbwbb/wcf/lib/data/user/activity/event/ViewableUserActivityEventList.class.php(82): wbb\system\user\activity\event\LikeablePostUserActivityEvent->prepare()
#2 /var/www/vhosts/s666.fsb.ru/freesoft-board.to/fsbwbb/wcf/lib/data/user/activity/event/ViewableRestrictedUserActivityEventList.class.php(23): wcf\data\user\activity\event\ViewableUserActivityEventList->readObjects()
#3 /var/www/vhosts/s666.fsb.ru/freesoft-board.to/fsbwbb/wcf/lib/system/event/listener/DashboardIgnoreBoardsListener.class.php(30): wcf\data\user\activity\event\ViewableRestrictedUserActivityEventList->readObjects()
#4 /var/www/vhosts/s666.fsb.ru/freesoft-board.to/fsbwbb/wcf/lib/system/event/EventHandler.class.php(134): wcf\system\event\listener\DashboardIgnoreBoardsListener->execute()
#5 /var/www/vhosts/s666.fsb.ru/freesoft-board.to/fsbwbb/wcf/lib/system/event/EventHandler.class.php(173): wcf\system\event\EventHandler->executeInheritedActions()
#6 /var/www/vhosts/s666.fsb.ru/freesoft-board.to/fsbwbb/wcf/lib/system/dashboard/box/AbstractContentDashboardBox.class.php(71): wcf\system\event\EventHandler->fireAction()
#7 /var/www/vhosts/s666.fsb.ru/freesoft-board.to/fsbwbb/wcf/lib/system/dashboard/box/RecentActivitySidebarDashboardBox.class.php(40): wcf\system\dashboard\box\AbstractContentDashboardBox->fetched()
#8 /var/www/vhosts/s666.fsb.ru/freesoft-board.to/fsbwbb/wcf/lib/system/dashboard/DashboardHandler.class.php(71): wcf\system\dashboard\box\RecentActivitySidebarDashboardBox->init()
#9 /var/www/vhosts/s666.fsb.ru/freesoft-board.to/fsbwbb/lib/page/BoardListPage.class.php(98): wcf\system\dashboard\DashboardHandler->loadBoxes()
#10 /var/www/vhosts/s666.fsb.ru/freesoft-board.to/fsbwbb/wcf/lib/page/AbstractPage.class.php(276): wbb\page\BoardListPage->assignVariables()
#11 /var/www/vhosts/s666.fsb.ru/freesoft-board.to/fsbwbb/wcf/lib/page/AbstractPage.class.php(100): wcf\page\AbstractPage->show()
#12 /var/www/vhosts/s666.fsb.ru/freesoft-board.to/fsbwbb/wcf/lib/system/request/Request.class.php(58): wcf\page\AbstractPage->__run()
#13 /var/www/vhosts/s666.fsb.ru/freesoft-board.to/fsbwbb/wcf/lib/system/request/RequestHandler.class.php(139): wcf\system\request\Request->execute()
#14 /var/www/vhosts/s666.fsb.ru/freesoft-board.to/fsbwbb/index.php(12): wcf\system\request\RequestHandler->handle()
#15 {main}