Does not see the class / file symfony 4

I study Symfony , in the Controller folder I want to create another Admin folder to bring out the controllers associated with the admin area. I get this error:

The autoloader expected class "App \ Controller \ Admin \ AdminsController" to be defined in file "C: \ xampp \ htdocs \ ibb \ vendor \ composer /../../ src \ Controller \ Admin \ AdminsController.php". It wasn’t really a typo in C: \ xampp \ htdocs \ ibb \ config / services.yaml (which is used in resource "C: \ xampp \ htdocs \ ibb \ config / services.yaml ").

File services.yml method "tyk" twisted - did not help. Here is the file:

 # Put parameters here that don't need to change on each machine where the app is deployed # https://symfony.com/doc/current/best_practices/configuration.html#application-related-configuration parameters: locale: 'en' services: # default configuration for services in *this* file _defaults: autowire: true # Automatically injects dependencies in your services. autoconfigure: true # Automatically registers your services as commands, event subscribers, etc. public: false # Allows optimizing the container by removing unused services; this also means # fetching services directly from the container via $container->get() won't work. # The best practice is to be explicit about your dependencies anyway. # makes classes in src/ available to be used as services # this creates a service per class whose id is the fully-qualified class name App\: resource: '../src/*' exclude: '../src/{Entity,Migrations,Tests,Kernel.php}' # controllers are imported separately to make sure services can be injected # as action arguments even if you don't extend any base controller class App\Controller\: resource: '../src/Controller' tags: ['controller.service_arguments'] # add more service definitions when explicit configuration is needed # please note that last definitions always *replace* previous ones 

routes.yml :

 admin: path: ibb/ttg.{_format} controller: App\Controller\Admin\AdminsController::entrance defaults: _format: html 

What do I need to do to make autoloader see this subdirectory?