When trying to add Configurable product to Cart the message "Product \"configurable\" type is not supported" received

[TomashKhamlai]

Preconditions (*)

1. Add configurable product to Cart #224 is merged or [Cart Operations] Add configurable product to Cart #142 is fixed (if not need to work create a new branch based on 142_Add_configurable_product_to_Cart, not 2.3-develop)

Steps to reproduce (*)

1. Create Configurable Product with
   Name & SKU: conf
   Weight: 1
   Price: 1
   Variations:

• sku: conf-white, qty: 12, price: 10
• sku: conf-black, qty: 12, price: 10

2. Perform GraphQL query:

mutation {
  addConfigurableProductsToCart(
    input: {
      cart_id: "gbK3g1pcEiyd39h2clKomLU6qsyFLAVT"
      cartItems: [
        {
          variant_sku: "conf-black"
          data: {
            qty: 1
            sku: "conf-black"
          }
        }
        {
          variant_sku: "conf-white"
          data: {
            qty: 1
            sku: "conf-white"
          }
        }
      ]
    }
  ) {
    cart {
      items {
        id
        qty
        product {
          name
          sku
        }
        ... on ConfigurableCartItem {
          configurable_options {
            option_label
          }
        }
    }
  }
  }
}

Expected result (*)

1. "Product "configurable" type is not supported"

Actual result (*)

stacktrace.json.txt

[XxXgeoXxX]

this issue related to #380.
And fix from #383 will help to solve this problem.