Stripe integration in React and Node

Question

Node code:

app.post("/create-payment-intent", async (req, res) => {
  try {

      const  { items }  = req.body;
      console.log(items)
      

    const paymentIntent = await stripe.paymentIntents.create({
      currency: "gbp",
      amount: items,
      automatic_payment_methods: { enabled: true },
    });

    // Send publishable key and PaymentIntent details to client
    res.send({
      clientSecret: paymentIntent.client_secret,
    });

React code:

 useEffect(() => {
    fetch("/create-payment-intent", {
      method: "POST",
      headers: {
        "Content-Type" : "application/json"
      },
      body: JSON.stringify({items: [{ price: totalAmount }]}),
    }).then(async (result) => {
      var { clientSecret } = await result.json();
      setClientSecret(clientSecret);
    });
  }, [totalAmount]);

Error: error

I do not understand why I cannot destructure items on the back end when it has been passed.

I have used the Stripe docs in order to attempt this: https://stripe.com/docs/payments/quickstart?locale=en-GB&lang=node