Fatal error: Uncaught Error: Class "GraphQL\Validator\Rules\ValidationRule" not found in /home/telefonai/public_html/test.telefonai.eu/vendor/webonyx/graphql-php/src/Validator/Rules/PossibleFragmentSpreads.php:21 Stack trace: #0 {main} thrown in /home/telefonai/public_html/test.telefonai.eu/vendor/webonyx/graphql-php/src/Validator/Rules/PossibleFragmentSpreads.php on line 21