Fatal error: Uncaught Error: Class 'Magento\Framework\App\Action\Action' not found in /home/esecureh/public_html/magdemo/vendor/magento/module-product-alert/Controller/Add.php:16 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/module-product-alert/Controller/Add.php on line 16