Fatal error: Uncaught Error: Trait "Symfony\Component\Routing\Loader\Configurator\Traits\HostTrait" not found in C:\wamp64\houda\vendor\symfony\routing\Loader\ContentLoaderTrait.php:22 Stack trace: #0 {main} thrown in C:\wamp64\houda\vendor\symfony\routing\Loader\ContentLoaderTrait.php on line 22