2626517 - Inbound processing in endpoint failed with message "Fault:HTTP verb was not GET or POST" while executing the Bundle Replication

CPI throws the below error while replicating Employee Master Data and Organizational Assignments from Employee Central to SAP HCM:
Inbound processing in endpoint at /XXXXX failed with message "Fault:HTTP verb was not GET or POST"

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental. 

SAP SuccessFactors HCM Suite 

Fault:HTTP verb was not GET or POST, Bundle Replication, Replicating Employee Master Data and Organizational Assignments from Employee Central to SAP ERP HCM, SF replication , KBA , LOD-SF-INT-CPI-ERP , Standard SF to SAP ERP or S/4HANA Integration using CPI , Problem