B2b Counterparty Nts Not Connected Exception
class B2bCounterpartyNtsNotConnectedException : PortOneException, DraftB2bTaxInvoiceException, GetB2bCounterpartyCertificateException, GetB2bCounterpartyCertificateRegistrationUrlException, IssueB2bTaxInvoiceImmediatelyException, RequestB2bTaxInvoiceReverseIssuanceException, UpdateB2bTaxInvoiceDraftException, ValidateB2bCounterpartyCertificateException
국세청에 연동되어 있지 않은 경우