Fatal error: Uncaught Error: Trait "Symfony\Component\Routing\Loader\Configurator\Traits\AddTrait" not found in C:\wamp64\houda\vendor\symfony\routing\Loader\Configurator\CollectionConfigurator.php:20 Stack trace: #0 {main} thrown in C:\wamp64\houda\vendor\symfony\routing\Loader\Configurator\CollectionConfigurator.php on line 20