3774819 - Managed Gateway for Spend&Network Error: "The incoming message is invalid with the following errors: urn:Ariba:Buyer:vsap:RequisitionImportAsyncPull@ line 31 in SoapResponseParse.groovy"

When sending RequisitionImportAsyncPullRequest transaction from SAP ERP to SAP Ariba Procurement solution, it fails in Managed Gateway for Spend&Network transaction tracker with following error:

Transimission failed with the error java.lang.Exception: java.lang.Exception: SOAP Fault :The incoming message is invalid with the following errors: urn:Ariba:Buyer:vsap:RequisitionImportAsyncPull@ line 31 in SoapResponseParse.groovy while posting to customer ANXXXXXXX-T - RealmName:XXXXX target system with HTTP ResponseCode: .. Suggested Action : Please contact support with ErrorCode:CIG-PLT-04641.

In the detailed error file downloaded from the Managed Gateway for Spend&Network transaction tracker for the failed transaction, you can see the following root cause of the failure:
<soapenv:Body>
<soapenv:Fault>
<Faultcode>Internal Server Error</Faultcode>
<Faultstring>The incoming message is invalid with the following errors: urn:Ariba:Buyer:vsap:RequisitionImportAsyncPull</Faultstring>
<Detail>cvc-datatype-valid.1.2.1: '' is not a valid value for 'dateTime'.</Detail>
<Detail>cvc-type.3.1.3: The value '' of element 'urn:NeedBy' is not valid.</Detail>
</soapenv:Fault>
</soapenv:Body> 

ERP Initiated Requisition error , KBA , BNS-ARI-CI-BUY-PRIMP , Managed Gateway for Procurement - ERP Requisition , BNS-ARI-CI-BUY , Managed Gateway for Procurement , Problem