Fatal error: Uncaught Error: Interface 'Magento\Framework\Event\ObserverInterface' not found in /home/esecureh/public_html/magdemo/dev/tests/integration/framework/Magento/TestFramework/Event/Magento.php:14 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/dev/tests/integration/framework/Magento/TestFramework/Event/Magento.php on line 14