Not enough points. There are 5 reasons.

1. The points are not enough to redeem the required Starbucks products.

2. Network problems caused transaction failure.

3. The China Merchants Bank card has been frozen or invalidated.

4. The credit limit has been exhausted. If you want to continue using your China Merchants Bank credit card to redeem Starbucks, try to increase your credit limit, check whether the network is normal, or use a credit card from another bank to pay.