Fatal error: Uncaught Error: Class "Twig_Extension" not found in C:\xampp\htdocs\electronica\vendor\kriswallsmith\assetic\src\Assetic\Extension\Twig\AsseticExtension.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\electronica\vendor\kriswallsmith\assetic\src\Assetic\Extension\Twig\AsseticExtension.php on line 17