Cannot read properties of undefined (reading: startsWith)

If i change bank code sandbox api is not working
Issues with overseas issued Visa Cards
결제위젯으로 가상계좌 결제 시 현금영수증 미발행하는 법
관리자 계정 변경 관련해서 문의드립니다.
receipt url validation period?
Question about requestPayment() method (Javascript Widget)
requestPayment() method can return a Promise for PC but not "Mobile environment". What's meaning of "Mobile environment"? Is it mean Mobile Browser?Is it necessary to import code from "paymentsdk" project into my project?
Testing credentials
I need help with payment integration
Refund With Virtual Account
Android app that pays with Payco, doesn't navigate to payment screen if user is not logged in
Any Accounting Software / invoice integrate with Toss Payment?
Error 500 when calling API billing authorize.
Is there any simple payment account (TOSSPAY, NAVERPAY...) for testing supported from Toss payment?
BrandPay - error 1090
Post for the Korea University inquiry
Billing payment expired how to handle that?