BR-Z-05
A rule of the European standard EN 16931 – applies to every invoice following the standard, including Peppol BIS Billing 3.0.
What this error means
BR-Z-05
In a line with zero-rated VAT (category Z) the rate is not 0.
How to fix it
Set the line cbc:Percent to 0; if the item is taxable, use category S with a real rate.