error 10103 - Error 10103 - UNSUPPORTED_PAYMENT_METHODS

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 requested payment method is not supported by your shop
You have transmitted a value (or a list of values) in the vads_payment_cards field. This value (or all the values on the list) is/are not supported by the MID(s) associated with your shop. To resolve the issue: Change the value of the vads_payment_cards field in your payment form. Check or update the MID association of your shop via your Expert Back Office (Settings > Shop menu > MID association tab).

The requested payment method is not supported by your shop

You have transmitted a value (or a list of values) in the vads_payment_cards field.

This value (or all the values on the list) is/are not supported by the MID(s) associated with your shop.

To resolve the issue:

Change the value of the vads_payment_cards field in your payment form.
Check or update the MID association of your shop via your Expert Back Office (Settings > Shop menu > MID association tab).