PEPPOL-EN16931-R004: The invoice is routed as a Peppol BIS Billing 3.0 document, but its…
What it means
The invoice is routed as a Peppol BIS Billing 3.0 document, but its specification identifier (BT-24) does not have the exact required value.
How to fix it
Set BT-24 to exactly 'urn:cen.eu:en16931:2017#compliant#urn:fdc:peppol.eu:2017:poacc:billing:3.0'.