Fatal error: Uncaught Error: Class 'Magento\Framework\Model\AbstractExtensibleModel' not found in /home/esecureh/public_html/magdemo/dev/tests/api-functional/_files/Magento/TestModuleMSC/Model/Data/Item.php:16 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/dev/tests/api-functional/_files/Magento/TestModuleMSC/Model/Data/Item.php on line 16