Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Definition" not found in /home/.sites/site4/wwwroot/web/ui/vendor/symfony/dependency-injection/ChildDefinition.php:23 Stack trace: #0 {main} thrown in /home/.sites/site4/wwwroot/web/ui/vendor/symfony/dependency-injection/ChildDefinition.php on line 23