Fatal error: Uncaught Error: Class 'Symfony\Component\DependencyInjection\ParameterBag\ParameterBag' not found in /home/app/htdocs/ninja/vendor/symfony/dependency-injection/ParameterBag/FrozenParameterBag.php:21
Stack trace:
#0 {main}
thrown in /home/app/htdocs/ninja/vendor/symfony/dependency-injection/ParameterBag/FrozenParameterBag.php on line 21