3415296 - Serious processing error requires fault handling: Could not find configuration entry for client XXX

Odata request fails with error like:

{"error":{"code":"/IWBEP/CM_COS/001","message":{"lang":"en","value":"Serious processing error requires fault handling: Could not find configuration entry for client "},"innererror":{"application":{"component_id":"XXXXXX","service_namespace":"/SAP/","service_id":"XXXXXX","service_version":"0001"},"transactionid":"b5bdcc8efbc54bc7b59a34649855e563","timestamp":"","Error_Resolution":{"SAP_Transaction":"","SAP_Note":"See SAP Note 1797736 for error analysis (https://service.sap.com/sap/support/notes/1797736)"},"errordetails":[{"ContentID":"","code":"CX_SOAP_IDP_FAULT","message":"Serious processing error requires fault handling: Could not find configuration entry for client ","propertyref":"","severity":"error","transition":false,"target":""},{"ContentID":"","code":"/IWBEP/CX_IDP_UTIL","message":"NetWeaver ?Idempotent Service Framework? error: Check configuration","longtext_url":"/sap/opu/odata/iwbep/message_text;o=LOCAL/","propertyref":"","severity":"error","transition":false,"target":""}]}}} 

SAP Odata

API_PURCHASEREQ_PROCESS_SRV, Idempotent, CX_SOAP_IDP_FAULT, /IWBEP/CX_IDP_UTIL, /IWBEP/CM_COS/001 , KBA , OPU-GW-COR , Framework , Problem