error 11

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 vads_ctx_mode field has not been sent to the payment gateway.

The vads_ctx_mode field is mandatory. It must be present and correctly populated in the payment form.

Make sure the vads_ctx_mode field is submitted to the payment gateway.

The vads_ctx_mode field is not filled in with TEST or PRODUCTION values.

The value of the vads_ctx_mode field should be TEST or PRODUCTION.

It must be capitalized, with no spaces or abbreviations (sending the PROD value to the payment gateway will cause an error).