Fatal error: Uncaught Error: Class 'Symfony\Component\DependencyInjection\Definition' not found in /home/app/htdocs/ninja/vendor/symfony/dependency-injection/Tests/Fixtures/CustomDefinition.php:16
Stack trace:
#0 {main}
thrown in /home/app/htdocs/ninja/vendor/symfony/dependency-injection/Tests/Fixtures/CustomDefinition.php on line 16