Fatal error: Uncaught Error: Class 'Symfony\Component\Config\Loader\Loader' not found in /home/bucereo/my_project_name/vendor/symfony/assetic-bundle/Routing/AsseticLoader.php:39 Stack trace: #0 {main} thrown in /home/bucereo/my_project_name/vendor/symfony/assetic-bundle/Routing/AsseticLoader.php on line 39