Fatal error: Uncaught Error: Class "GraphQL\Validator\ASTValidationContext" not found in /home/telefonai/public_html/test.telefonai.eu/vendor/webonyx/graphql-php/src/Validator/SDLValidationContext.php:7 Stack trace: #0 {main} thrown in /home/telefonai/public_html/test.telefonai.eu/vendor/webonyx/graphql-php/src/Validator/SDLValidationContext.php on line 7