Fatal error: Uncaught Error: Interface "Symfony\Contracts\Service\ServiceProviderInterface" not found in D:\Apache24\www\dls\back-end\vendor\symfony\service-contracts\ServiceCollectionInterface.php:24 Stack trace: #0 {main} thrown in D:\Apache24\www\dls\back-end\vendor\symfony\service-contracts\ServiceCollectionInterface.php on line 24