The cause of the error cannot be determined for the time being. I suggest you call the bank's customer service hotline. At the end of the year, many businesses have been strictly investigated.

1. Card is frozen: the card is currently frozen, and authentication cannot be performed when swiping the card, and an authentication failure prompt will appear.

2. Abnormal card status: the card has been degaussed, and the password has been locked too many times, exceeding the payment limit of the day, and the authentication failed.

3. Unstable network: When using POS machine to swipe the card, unstable network connection will also lead to authentication failure.

4. The card does not support the current transaction: for example, a credit card with a single logo does not support UnionPay transactions.

5.IC chip cards cannot be swiped: IC chip cards can only be swiped at present, and swiping cards will encounter authentication failure.