error 10104 - Error 10104 - UNAVAILABLE_PAYMENT_METHOD

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 payment method used for the payment is not supported by your shop.
You have transmitted a value (or a list of values) in the vads_payment_cards field to specify the card types that can be used for the payment. This value (or all the values on the list) is/are supported by the MID(s) associated with your shop. However, none of these card types are enabled within the MID(s) associated with your shop. To resolve the issue: Update MID association via your Merchant Back Office (Settings > Shop menu > MID association tab). Contact E-commerce customer service.

The payment method used for the payment is not supported by your shop.

You have transmitted a value (or a list of values) in the vads_payment_cards field to specify the card types that can be used for the payment.

This value (or all the values on the list) is/are supported by the MID(s) associated with your shop.

However, none of these card types are enabled within the MID(s) associated with your shop.

To resolve the issue:

Update MID association via your Merchant Back Office (Settings > Shop menu > MID association tab).
Contact E-commerce customer service.