Fatal error: Uncaught Error: Class 'GraphQL\Validator\Rules\ValidationRule' not found in /home/devypfrfhn/avancement.devyp.fr/vendor-old/webonyx/graphql-php/src/Validator/Rules/VariablesInAllowedPosition.php:18 Stack trace: #0 {main} thrown in /home/devypfrfhn/avancement.devyp.fr/vendor-old/webonyx/graphql-php/src/Validator/Rules/VariablesInAllowedPosition.php on line 18