3799779 - Error: "A sequence of more than one item is not allowed as the first argument of fn:normalize-space() (" ", " ")"

When a Order Confirmation (ConfirmationRequest) is sent to the Managed Gateway for Spend&Network from the SAP Business Network with an attachment in the line for 42K scope, it fails in the Managed Gateway for Spend&Network Transaction Tracker with the error:

A sequence of more than one item is not allowed as the first argument of fn:normalize-space() (" ", " ")

Cig, order, confirmation, orderconfirmation, process, sbn , KBA , BNS-ARI-CI-AN-OC , Managed Gateway for Business Network - OC , BNS-ARI-CI-S4-MM , Managed Gateway for S/4 SOAP API MM , Problem