2302509 - Invalid SFAPI Session with CPI tenant - SuccessFactors HCM Suite

A report run from SAP HCM to Success Factors through CPI, would fail with invalid Session id in SAP ERP system as below

You can also observe some other error messages inside your CPI message process logs, like the ones below:

• java.lang.NullPointerException: while trying to invoke the method com.sap.it.rt.adapter.sfsf.wsclient.parser.QueryResponseParser$NumResultsHadMoreSessionId.getNumResults() of a null object loaded from local variable 'numResultHasMoreSessionId'
• Problem during invoking SuccessFactors Web service. SOAP faultCode ns2:Server, faultString Invalid SFAPI session!, errorCode INVALID_SESSION, errorMessage: Invalid SFAPI session!

• SAP ERP HCM System
• SuccessFactors HCM Suite - SFAPI API
• CPI (SAP Cloud Platform Integration)

CPI, HCI, java.lang.NullPointerException: while trying to invoke the method com.sap.it.rt.adapter.sfsf.wsclient.parser.QueryResponseParser$NumResultsHadMoreSessionId.getNumResults() of a null object loaded from local variable 'numResultHasMoreSessionId', Problem during invoking SuccessFactors Web service. SOAP faultCode ns2:Server, faultString Invalid SFAPI session!, errorCode INVALID_SESSION, errorMessage: Invalid SFAPI session!, SAP HCM ERP, standard artifacts, SAP Cloud Platform Integration , KBA , LOD-SF-INT-CPI , Standard SF to 3rd Party CPI (HCI) Content , LOD-SF-INT , Integrations , LOD-SF-INT-CUS , SF Boomi & CPI (HCI) Custom Content , How To