Fatal error: Uncaught Error: Class "Magento\Backend\App\Action" not found in /home/www/staging1.gamanorteweb.com/app/code/Sm/MegaMenu/Controller/Adminhtml/MenuItems/Duplicate.php:15 Stack trace: #0 {main} thrown in /home/www/staging1.gamanorteweb.com/app/code/Sm/MegaMenu/Controller/Adminhtml/MenuItems/Duplicate.php on line 15