Fatal error: Uncaught Error: Class "Symfony\Component\Routing\Loader\ObjectLoader" not found in /home/tubu/public_html/Drupal_CMS/cms/vendor/symfony/routing/Loader/ContainerLoader.php:21 Stack trace: #0 {main} thrown in /home/tubu/public_html/Drupal_CMS/cms/vendor/symfony/routing/Loader/ContainerLoader.php on line 21