Our store has been getting this error messages on the onepage checkout since we upgraded to 22.214.171.124. We use IWD's One Page Checkout extension (version 4.2.2). We can't seem to duplicate this error. It only happens to 2 out of 10 orders. Also, we require our customers to login or signup before they can checkout. Any help is greatly appreciated.
Payment transaction failed.
Did you get a solution to this as we are having the same problems
Unfortunately, IWD couldn't duplicate the error. We ended up using a different one page checkout extension.