Transaction Error: Token Authentication failed. Received invalid response from remote entity

What does 'Token Authentication failed. Received invalid response from remote entity' mean?

The token provided by the customer could not be verified by the bank as at the time of transaction.

What can I do about it?

The customer needs to retry the transaction at a later time or escalate to their bank if the error persists. The customer can also use alternative channels on the checkout to complete the transaction.