1. Insufficient credit card balance: the credit card is used for payment, but the credit card balance is insufficient, or the credit card has reached the upper limit, so the payment cannot be completed.
2. Incorrect payment information: Incorrect payment information, such as credit card number, expiration date or security code, can also lead to payment failure.
3. Geographical limitation: quest2 cannot make payment in some areas, or needs to use a specific payment method.
4. network connection problem: unstable or slow network connection will lead to payment failure.