Fatal error: Uncaught Error: Class 'Magento\Framework\App\Helper\AbstractHelper' not found in /home/esecureh/public_html/magdemo/vendor/magento/module-developer/Helper/Data.php:14 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/module-developer/Helper/Data.php on line 14