error 10128 - Error 10128 - SOFORT_MISSING_API_KEY

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:

Your Sofort MID configuration is incomplete.
You have requested the creation of payment on the SOFORT network. However, you have not populated the API Key field in your contract configuration. To resolve the issue: Sign in to your Merchant Back Office and via Settings > Company, open the Merchant IDs tab. Double-click your Sofort contract to complete the configuration.

Your Sofort MID configuration is incomplete.

You have requested the creation of payment on the SOFORT network. However, you have not populated the API Key field in your contract configuration.

To resolve the issue:

Sign in to your Merchant Back Office and via Settings > Company, open the Merchant IDs tab. Double-click your Sofort contract to complete the configuration.