If the PSU is facing this error while making a payment attempt, the issue is likely related to the information sent by the merchant. For example, the address format might be incorrect.
How to understand the required format of the address field
The regex for the address fields for this bank is the following:
^[A-Za-z0-9#$%'\s]*$
This highlights the valid characters that can be used. For example, commas in addresses will cause the error to occur.
To resolve this issue we would recommend for the merchant to check if the adress they are sending is in the correct format.