Fatal error: Uncaught Error: Class 'Magento\Backend\Block\Template' not found in /home/esecureh/public_html/magdemo/vendor/magento/module-theme/Block/Adminhtml/Design/Config/Edit/Scope.php:19 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/module-theme/Block/Adminhtml/Design/Config/Edit/Scope.php on line 19