Cause of the vads_language error
|The format of the field is incorrect.|
The vads_language field defines the language of the payment page (ISO 639-1 standard). It must consist of alphabetic characters with a fixed length of 2 characters (a2).
If the field has not been sent or is empty, the payment page will be shown in the language of the buyer’s browser
|If you have confided the administration of your shop to a Web agency, send them the e-mail notification you received.|