Fatal error: Class 'Symfony\Component\Config\Loader\FileLoader' not found in /var/www/html/dev/spa/vendor/symfony/routing/Symfony/Component/Routing/Loader/YamlFileLoader.php on line 29 Call Stack: 0.0009 280872 1. {main}() /var/www/html/dev/spa/vendor/symfony/routing/Symfony/Component/Routing/Loader/YamlFileLoader.php:0