1833910 - HTTP Error 403 or 404 when running SWN_SELSEN (Extended Notifications)

• Extended Notifications (Report SWN_SELSEN) to send notifications about new work items to users but no notification e-mail arrives in the users inbox.   
  
  AND
  
  
• The application log (transaction SLG1 object WF Subobject NOTIFICATIONS) displays the errors:
• HTTP error 404 (or 403) when creating message (Message no. SWN065),
• Error when creating message (Message no. SWN032).

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

• SAP Business Workflow
• SAP NetWeaver
• SAP Web Application Server for SAP S/4 HANA
• ABAP PLATFORM - Application Server ABAP

WF_GDPR, SWF_WORKFLOW, WF_SAP4ME, extended notifications, swn_message1, swn_wiexecute, SWN_SELSEN, SWNCONFIG, SWNADMIN, http 404, http403, SHTTP009, HTTP error 403 when creating message, SWN 065, SWN 032, 00000000 messages sent, HTTP error 404 when creating message, SWN_MESSAGE1, SWN_WIEXECUTE, SHORTCUT (BC), SHORTCUT (Public), Start BSP flag of the controller main.do of BSP application, SICF , KBA , BC-BMT-WFM-NOT , WebFlow Notifications , BC-BMT-WFM , Business Workflow , BC-SRV-COM , Communication Services: Mail, Fax, SMS, Telephony , Problem