Fatal error: Uncaught Error: Class 'Symfony\Component\DependencyInjection\Definition' not found in /home/app/htdocs/ninja/vendor/symfony/dependency-injection/ChildDefinition.php:23
Stack trace:
#0 {main}
thrown in /home/app/htdocs/ninja/vendor/symfony/dependency-injection/ChildDefinition.php on line 23