let tossPayments = null
let paymentMethodWidget = null;
let agreementWidget = null;
let widgets = null;

const clientKey = "test_gck_GePWvyJnrKmndDDa9nqa3gLzN97E";
        if (tossPayments == null) {
            tossPayments = await loadTossPayments(clientKey);
        }

        widgets = tossPayments.widgets({
            customerKey: `${me.username}${me._id}`,
            brandpay: {
                redirectUrl: 'http://127.0.0.1:5173/api/tosspayments/brandpay-auth',
            },
        });

        widgets.setAmount({
            currency: item.quote,
            value: item.price * itemCount,
        });

        paymentMethodWidget = await widgets.renderPaymentMethods({
            selector: "#payment-container",
        });

        agreementWidget = await widgets.renderAgreement({
            selector: "#payment-agreement",
        });

        paymentMethodWidget.on('paymentMethodSelect', async (paymentMethod) => {
            console.log(paymentMethod.code)
        });

let tossPayments = null
let paymentMethodWidget = null;
let agreementWidget = null;
let widgets = null;

const clientKey = "test_gck_GePWvyJnrKmndDDa9nqa3gLzN97E";
        if (tossPayments == null) {
            tossPayments = await loadTossPayments(clientKey);
        }

        widgets = tossPayments.widgets({
            customerKey: `${me.username}${me._id}`,
            brandpay: {
                redirectUrl: 'http://127.0.0.1:5173/api/tosspayments/brandpay-auth',
            },
        });

        widgets.setAmount({
            currency: item.quote,
            value: item.price * itemCount,
        });

        paymentMethodWidget = await widgets.renderPaymentMethods({
            selector: "#payment-container",
        });

        agreementWidget = await widgets.renderAgreement({
            selector: "#payment-agreement",
        });

        paymentMethodWidget.on('paymentMethodSelect', async (paymentMethod) => {
            console.log(paymentMethod.code)
        });

TypeError: Failed to construct 'Headers': String contains non ISO-8859-1 code point

TypeError: Failed to construct 'Headers': String contains non ISO-8859-1 code point