Fatal error: Uncaught Error: Class "Magento\Framework\Model\ResourceModel\Db\AbstractDb" not found in /var/www/magento/html/app/code/Aheadworks/Blog/Model/ResourceModel/PostPreview.php:26 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/Aheadworks/Blog/Model/ResourceModel/PostPreview.php on line 26