Fatal error: Uncaught Error: Class "Amasty\XmlSitemap\Model\Source\Product" not found in /var/www/magento/html/app/code/BBNT/AmastyXMLSitemap/Model/Source/Product.php:28 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/BBNT/AmastyXMLSitemap/Model/Source/Product.php on line 28