Why is LaravelShoppingcart throwing an error?

Question

Laravel

I am trying to use LaravelShoppingcart in my project. In the controller I do the following

Cart::add('293ad', 'Product 1', 1, 9.99, array('size' => 'large'));

and he answered me
ReflectionException in Container.php line 737:
Class cart does not exist
Everything is written in the config as in the manual on GitHub
PS I tried 3 different Carts and everything is the same