Fatal error: Uncaught Error: Class 'Magento\PageCache\Controller\Block' not found in /home/esecureh/public_html/magdemo/vendor/magento/module-page-cache/Controller/Block/Esi.php:9 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/module-page-cache/Controller/Block/Esi.php on line 9