In PRODUCTION mode, if your buyer gets an error message such as:
|An error occurred during the payment request, please make sure that the posted parameters match the ones specified in the documentation.|
It becomes impossible to make the payment and the transaction is definitively lost.
You will receive an e-mail notification containing the form that the gateway was unable to process and the value of the invalid field.
We invite you to check the following reason(s) to resolve the issue:
|The MID is not associated with the shop.|
You have forced the payment method to be used (vads_payment_cards) in your payment form.
However, in order to work, this payment method requires for a CB contract to be associated with the shop.