fatalPeppol BIS Billing 3.0profileUBLBT-43
The element "Seller contact email address" (BT-43) shall be provided.
The seller contact e-mail address (BT-43) is missing.
Add an e-mail address (UBL Contact/cbc:ElectronicMail). It must contain exactly one @ - see BR-DE-28.
UBL — context (/ubl-invoice:Invoice/cac:AccountingSupplierParty/cac:Party/cac:Contact | /ubl-creditnote:CreditNote/cac:AccountingSupplierParty/cac:Party/cac:Contact)[$supplierCountryIsDE and $customerCountryIsDE]
cbc:ElectronicMail[boolean(normalize-space(.))]