Fatal error: Uncaught Error: Class "PhpCollection\Sequence" not found in C:\xampp\htdocs\electronica\vendor\jms\di-extra-bundle\JMS\DiExtraBundle\DependencyInjection\Collection\LazyServiceSequence.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\electronica\vendor\jms\di-extra-bundle\JMS\DiExtraBundle\DependencyInjection\Collection\LazyServiceSequence.php on line 8