Fatal error: Uncaught Error: Class "GraphQL\Validator\ASTValidationContext" not found in /home/rosengar/www-craft/craft-rosengart/vendor/pixelandtonic/graphql-php/src/Validator/SDLValidationContext.php:7 Stack trace: #0 {main} thrown in /home/rosengar/www-craft/craft-rosengart/vendor/pixelandtonic/graphql-php/src/Validator/SDLValidationContext.php on line 7