2004: Due date parameter(s) not valid

At least one of the due date parameters is invalid. Please refer to chapter “Content parameter/Invoicing” of the API documentation. This rejection does not submit a customer message because it only can be returned with the backend operation CONFIRMATION_DELIVER.

Language Message
DEU Es trat ein technischer Fehler auf. Bitte versuchen Sie es zu einem späteren Zeitpunkt nochmal.
ENG A technical error has occurred. Please try again at a later point in time.
FRA Une erreur technique est survenue. Veuillez réessayer plus tard.
NLD Er is een technische fout opgetreden. Probeert u het op een later tijdstip alstublieft nogmaals.

Refers to Result Code:

150: Processing failed