tengo este problema que no me deja avanzar
ErrorException (E_ERROR)
ErrorException (E_ERROR)
Undefined variable: product_id (View: C:\xampp\htdocs\CarritoCompra\resources\views\in_shopping_carts\form.blade.php) (View: C:\xampp\htdocs\CarritoCompra\resources\views\in_shopping_carts\form.blade.php)