Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Loader\LoaderInterface" not found in /srv/www/sites/public/starter-cms/vendor/symfony/routing/Loader/AttributeClassLoader.php:54 Stack trace: #0 {main} thrown in /srv/www/sites/public/starter-cms/vendor/symfony/routing/Loader/AttributeClassLoader.php on line 54