Fatal error: Uncaught Error: Class 'Magento\Sitemap\Controller\Adminhtml\Sitemap' not found in /home/esecureh/public_html/magdemo/vendor/magento/module-sitemap/Controller/Adminhtml/Sitemap/Generate.php:19 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/module-sitemap/Controller/Adminhtml/Sitemap/Generate.php on line 19