Fatal error: Uncaught Error: Class 'Symfony\Component\Templating\Helper\Helper' not found in /home/synap/fr/synap/dev/www/7/vendor/symfony/assetic-bundle/Symfony/Bundle/AsseticBundle/Templating/AsseticHelper.php:24 Stack trace: #0 {main} thrown in /home/synap/fr/synap/dev/www/7/vendor/symfony/assetic-bundle/Symfony/Bundle/AsseticBundle/Templating/AsseticHelper.php on line 24