Intergrate payment windows: easyPay is KAKAOPAY

I'm having an issue integrating the payment window following the documentation at this link: https://docs.tosspayments.com/en/integration#integrate-payment-windows.

When I set easyPay to NAVERPAY or TOSSPAY, the payment popup displays normally. However, when I set easyPay to KAKAOPAY, clicking the Pay button does not trigger any response.

Checking the console log, I see the error message: NOT_SUPPORTED_EASYPAY_METHOD.
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Start your payment window integration. Supported payment methods include card, digital wallets such as TossPay, NaverPay, SamsungPay, KakaoPay etc, transfer, virtual accounts, mobile phone, and gift certificates.
Integrate payment windows | 토스페이먼츠 개발자센터
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