Hi @phiyen01,
I'm sorry to hear that you're encountering an error when making a purchase. The information that @RichardMaison copied was written for merchants, to help them troubleshoot their own chaeckout experiences when their buyers get that specific error.
In your case, the error is different and can be due to a wide range of things. Here are a few things you can check. If all of those things have been ruled out, it is possible that the payment is being declined for security reasons. The system may prevent a transaction from occurring if there are any indications of potential risk of unauthorized use or other security issues. In that case, it would be best to try the payment again at a later date or with a different payment method.
I hope this helps!
Olivia
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