BR-AE-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-AE-05
In a line with reverse charge (category AE) the rate is not 0 — under reverse charge the rate must be 0.
How to fix it
Set the line cbc:Percent to 0; the buyer accounts for the VAT.