Message
ART-0008 - Article revenue group is mandatory
Translation: ART-0008 - Artikelomzetgroep is verplicht
Cause
There is no article revenue group in SnelStart, which prevents the creation of an article through the integration.
Solution
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.