we bought the extension for mastermayment.
we got the merchant and the secret-key, but always we have the failure with payment failure.
Directly with the developers of masterpayment we found, that at the end of the url s "afterbuy"
The developer of masterpayment is shure, that is wrong.
But in the backend we dont have any fields to fill out or configurate anything.
so, is the payment plugin working?
what ist the problem, what is to change that it is working?
Thanks for your help
With best regards