server responded with a status of 405 (Method Not Allowed)

Question

when i press the add to cart button it is not working and in the console it is saying 405 method not allowed

$.ajaxSetup({
                    headers:{
                        'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
                    }
                });
                $.ajax({
                    type: "post",
                    url: "add-to-cart",
                    data: {
                        'product_id':product_id,
                        'product_qty':product_qty,
                    },
                    success: function (response) {
                        swal(response.status);
                    }
                });
            });

Route::middleware(['auth'])->group(function () {

    Route::post('add-to-cart', [CartController::class, 'addProduct']);
});