Fatal error: Uncaught Error: Interface 'Magento\Framework\Event\ManagerInterface' not found in /home/esecureh/public_html/magdemo/vendor/magento/framework/Event/Manager.php:11 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/framework/Event/Manager.php on line 11