Fatal error: Uncaught Error: Class 'Magento\Framework\Model\ResourceModel\Db\AbstractDb' not found in /home/esecureh/public_html/magdemo/vendor/magento/module-catalog-inventory/Model/ResourceModel/Stock/Item.php:20 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/module-catalog-inventory/Model/ResourceModel/Stock/Item.php on line 20