Fatal error: Uncaught Error: Call to a member function getChildHtml() on null in /home/esecureh/public_html/magdemo/vendor/magento/module-email/view/adminhtml/templates/template/list.phtml:7 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/module-email/view/adminhtml/templates/template/list.phtml on line 7