Fatal error: Uncaught Error: Class "Magento\Backend\App\Action" not found in /var/www/magento/html/app/code/Amasty/BannersLite/Controller/Adminhtml/Banners/Upload.php:12 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/Amasty/BannersLite/Controller/Adminhtml/Banners/Upload.php on line 12