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