Fatal error: Uncaught Error: Class 'Magento\Variable\Controller\Adminhtml\System\Variable' not found in /home/esecureh/public_html/magdemo/vendor/magento/module-variable/Controller/Adminhtml/System/Variable/Validate.php:14 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/module-variable/Controller/Adminhtml/System/Variable/Validate.php on line 14