There may be three reasons:

1, there is something wrong with your computer system. If the browser has a new plug-in, it is not completely closed before opening, or there is something wrong with the computer system itself.

There is something wrong with your bank account. Such as insufficient balance, frozen or locked account, etc.

3. There is a problem between Taobao and the bank gateway, which leads to abnormal payment transaction.

I hope I can help you.