ART-0008 - Article revenue group is mandatory
Translation: ART-0008 - Artikelomzetgroep is verplicht
There is no article revenue group in SnelStart, which prevents the creation of an article through the integration.
Make sure that the basic data of articles are correctly configured in SnelStart. For each VAT rate, ensure that an article revenue group is set up.
Please see this original SnelStart article on how to set up an article revenue group.