Laravel 5 Payum provider not working

I have installed payum for laravel 5 but my providers are not updating correctly.

I added 'Payum\LaravelPackage\PayumServiceProvider' to app/config/app.php file.

'providers' => [
     ...      
     //All my providers
    'Payum\LaravelPackage\PayumServiceProvider',
],

also tried as

'providers' => [
     ...      
     //All my providers
     Payum\LaravelPackage\PayumServiceProvider::class,
],

anyway the error message i get whenever i try to use artisan to make a controller or any other thing is:

am i missing any configuration for the service provider? any help will be apreciated.

via Chebli Mohamed