Fatal error: Uncaught Error: Class "Magento\Catalog\Block\Product\AbstractProduct" not found in /var/www/magento/html/app/code/BBNT/Catalog/Block/Upsells.php:5 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/BBNT/Catalog/Block/Upsells.php on line 5