Fatal error: Uncaught Error: Class "Magento\Backend\Block\Widget\Form\Generic" not found in /home/www/staging1.gamanorteweb.com/app/code/Sm/MegaMenu/Block/Adminhtml/MenuGroup/Edit/Tab/FromItemsNoGroupId.php:11 Stack trace: #0 {main} thrown in /home/www/staging1.gamanorteweb.com/app/code/Sm/MegaMenu/Block/Adminhtml/MenuGroup/Edit/Tab/FromItemsNoGroupId.php on line 11