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

#0 /www/htdocs/w011d759/4.WoltLab/wbb4/wbb4gks/wcf/lib/system/dashboard/box/AbstractContentDashboardBox.class.php(52): easymedia\system\dashboard\box\ImagesSliderContentDashboardBox->render()
#1 /www/htdocs/w011d759/4.WoltLab/wbb4/wbb4gks/wcf/lib/system/dashboard/DashboardHandler.class.php(74): wcf\system\dashboard\box\AbstractContentDashboardBox->getTemplate()
#2 /www/htdocs/w011d759/4.WoltLab/wbb4/wbb4gks/wcf/lib/page/DashboardPage.class.php(52): wcf\system\dashboard\DashboardHandler->loadBoxes('com.woltlab.wcf...', Object(wcf\page\DashboardPage))
#3 /www/htdocs/w011d759/4.WoltLab/wbb4/wbb4gks/wcf/lib/page/AbstractPage.class.php(276): wcf\page\DashboardPage->assignVariables()
#4 /www/htdocs/w011d759/4.WoltLab/wbb4/wbb4gks/wcf/lib/page/AbstractPage.class.php(100): wcf\page\AbstractPage->show()
#5 /www/htdocs/w011d759/4.WoltLab/wbb4/wbb4gks/wcf/lib/system/request/Request.class.php(58): wcf\page\AbstractPage->__run()
#6 /www/htdocs/w011d759/4.WoltLab/wbb4/wbb4gks/wcf/lib/system/request/RequestHandler.class.php(139): wcf\system\request\Request->execute()
#7 /www/htdocs/w011d759/4.WoltLab/wbb4/wbb4gks/index.php(10): wcf\system\request\RequestHandler->handle('wbb')
#8 {main}