2625642 - Open Workitem Error: Log on with a dialog user (termination: ERROR_MESSAGE_STATE)

Approvers are experiencing the following error:

• when opening work items from Fiori Unified Inbox,
  OR
• when selecting a  work item in Enterprise Portal UWL (Universal Worklist).

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

SWF_WORKFLOW, Exception of type /IWFND/CX_SODATA has occurred, /IWCOR/CX_DS_NOT_FOUND has occurred, /IWBEP/CM_MGW_RT 107, /IWFND/CL_MGW_RUNT_RCLNT_UTILSCP, TASKPROCESSING, /IWFND, 500 SAP Internal Server Error, Error: Log on with a dialog user (termination: ERROR_MESSAGE_STATE), Internet Communication Framework (ICF), GUI connection, restrictions, logon data tab, Unable to approve Workflow request in Portal, Dialog logon (SAP GUI), dialog user type, service user type, white screen, blank screen, empty, empty pop-up window with error, mimes, itsmobile, ITS, , KBA , BC-BMT-WFM , Business Workflow , BC-FES-WGU , SAP GUI for HTML , BC-FES-ITS , SAP Internet Transaction Server , BC-MID-ICF , Internet Communication Framework , EP-BC-UWL , Universal Worklist , OPU-BSE-WFM , Gateway Business Workflow Enablement , Problem