Class 'App\Providers\AppServiceProvider' not found

I have changed my application by using command

php artisan app:name [app_name].

Then, when I try to perform other actions using following artisan commands,

php artisan down

php artisan up

php artisan config:cache

I got the following error:

PHP Fatal error:  Class 'App\Providers\AppServiceProvider' not found

How can I solve it?

via Chebli Mohamed