BR-KSA-44 error

Please, I need an explain of my problem
I am on simulation api
why it ask me for VAT for the buyer although my invoice is a simplified 0200000

Error code BR-KSA-44
If it exists in the invoice , the buyer VAT registration number or buyer group VAT registration number (BT-48) must contain 15 digits. The first digit and the last digit is “3”.

@khaledmaqtari

Try remove this element from AccountingCustomerParty if your Customer does not have VAT Number

<cac:PartyTaxScheme>
    <cbc:CompanyID></cbc:CompanyID>
    <cac:TaxScheme>
        <cbc:ID>VAT</cbc:ID>
    </cac:TaxScheme>
</cac:PartyTaxScheme>

Thank you very much
That solved it!