Fatal error: Uncaught Error: Class "Symfony\Component\Templating\Helper\Helper" not found in C:\xampp\htdocs\electronica\vendor\symfony\assetic-bundle\Templating\AsseticHelper.php:24 Stack trace: #0 {main} thrown in C:\xampp\htdocs\electronica\vendor\symfony\assetic-bundle\Templating\AsseticHelper.php on line 24