WCF::handleException() Unhandled exception: count(): Argument #1 ($value) must be of type Countable|array, RecursiveIteratorIterator given

#0 /var/www/html/easymedia/lib/system/dashboard/box/VideoCategoriesSidebarDashboardBox.class.php(45): count()
#1 /var/www/html/wcf/lib/system/dashboard/box/AbstractSidebarDashboardBox.class.php(31): easymedia\system\dashboard\box\VideoCategoriesSidebarDashboardBox->render()
#2 /var/www/html/wcf/lib/system/dashboard/DashboardHandler.class.php(77): wcf\system\dashboard\box\AbstractSidebarDashboardBox->getTemplate()
#3 /var/www/html/easymedia/lib/page/VideoListPage.class.php(219): wcf\system\dashboard\DashboardHandler->loadBoxes()
#4 /var/www/html/wcf/lib/page/AbstractPage.class.php(276): easymedia\page\VideoListPage->assignVariables()
#5 /var/www/html/wcf/lib/page/AbstractPage.class.php(100): wcf\page\AbstractPage->show()
#6 /var/www/html/wcf/lib/system/request/Request.class.php(58): wcf\page\AbstractPage->__run()
#7 /var/www/html/wcf/lib/system/request/RequestHandler.class.php(139): wcf\system\request\Request->execute()
#8 /var/www/html/easymedia/index.php(10): wcf\system\request\RequestHandler->handle()
#9 {main}