Fatal error: Uncaught Error: Interface 'Illuminate\Contracts\Support\Arrayable' not found in C:\xampp\htdocs\enercard\vendor\gloudemans\shoppingcart\src\CartItem.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\enercard\vendor\gloudemans\shoppingcart\src\CartItem.php on line 9