Fatal error: Uncaught Error: Interface 'Magento\Framework\GraphQl\Query\ErrorHandlerInterface' not found in /home/esecureh/public_html/magdemo/vendor/magento/framework/GraphQl/Query/ErrorHandler.php:17 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/framework/GraphQl/Query/ErrorHandler.php on line 17