Fatal error: Uncaught Error: Interface "Symfony\Contracts\Service\ServiceSubscriberInterface" not found in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\translation\Tests\DependencyInjection\fixtures\ServiceSubscriber.php:9 Stack trace: #0 {main} thrown in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\translation\Tests\DependencyInjection\fixtures\ServiceSubscriber.php on line 9