Fatal error: Uncaught Error: Class "Magento\Framework\Model\AbstractExtensibleModel" not found in /var/www/magento/html/app/code/BBNT/GiftCardAccount/Model/RmsGiftcardAccount.php:14 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/BBNT/GiftCardAccount/Model/RmsGiftcardAccount.php on line 14