Fatal error: Uncaught Error: Class "Magento\Framework\Model\ResourceModel\Db\AbstractDb" not found in /var/www/magento/html/app/code/MGS/Lookbook/Model/ResourceModel/Item.php:8 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/MGS/Lookbook/Model/ResourceModel/Item.php on line 8