Fatal error: Uncaught Error: Class 'Magento\Framework\Api\AbstractSimpleObject' not found in /home/esecureh/public_html/magdemo/dev/tests/api-functional/_files/Magento/TestModuleDefaultHydrator/Model/Data/ExtensionAttribute.php:8 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/dev/tests/api-functional/_files/Magento/TestModuleDefaultHydrator/Model/Data/ExtensionAttribute.php on line 8