PEPPOL-EN16931-R001
An official OpenPeppol BIS Billing 3.0 rule – checked for invoices sent over the Peppol network on top of the EN 16931 rules.
What this error means
PEPPOL-EN16931-R001
The business process (ProfileID) is missing — Peppol requires it.
How to fix it
Add cbc:ProfileID with urn:fdc:peppol.eu:2017:poacc:billing:01:1.0.