Fatal error: Uncaught Error: Class 'Folklore\GraphQL\Support\Mutation' not found in /home/devypfrfhn/alavance.devyp.fr/app/GraphQL/Mutation/UpdateSlotAvailabilityMutation.php:11 Stack trace: #0 {main} thrown in /home/devypfrfhn/alavance.devyp.fr/app/GraphQL/Mutation/UpdateSlotAvailabilityMutation.php on line 11