Fatal error: Uncaught Error: Class 'GraphQL\Validator\Rules\ValidationRule' not found in /home/itscm/dev.its.cm/itsgateway/vendor/webonyx/graphql-php/src/Validator/Rules/NoUndefinedVariables.php:18 Stack trace: #0 {main} thrown in /home/itscm/dev.its.cm/itsgateway/vendor/webonyx/graphql-php/src/Validator/Rules/NoUndefinedVariables.php on line 18