2419849 - System error when searching for substitutes in My Inbox 2.0

• Users are experiencing System error. For more information, check the details or contact your system administrator message, when searching for possible substitutes in My Inbox application.
  
  
  
  AND
  
  
• User Search is not enabled error message in Browser Console.
• OR No results in the User Search.

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

• Task Gateway
• SAP NetWeaver
• SAP Web Application Server for SAP S/4HANA
• ABAP PLATFORM - Application Server ABAP
• My Inbox Fiori Application

SAP_GWFND, IW_PGW, /IWPGW/TGW, /IWPGW/CL_TGW_EDP_TASK, ACTION_SEARCH_USERS, get_tgw_configuration, lv_usersearch_enabled, Task Gateway Service Settings, Enable User List, can not add substitutes, user search not working, user search disabled, /IWPGW/TGW_SERVICE, 010, /IWPGW/TGW_SERVICE/005, /IWPGW/TGW_SERVICE/010, HTTP request failed 400, Bad Request, system alias, for local app, local sap gw, Indicates that System Alias Points to Local SAP GW Instance, SAP Gateway is a system alias, Indicates that the System Alias is to be used by BEP, Set this flag if you use this system alias for an OData Channel application that has been developed on the BEP add-on which is deployed on the SAP Gateway hub system, SAP Customizing Implementation Guide, SAP NetWeaver, SAP Gateway, OData Channel, Configuration, Connection Settings, SAP Gateway to SAP System, Manage SAP System Aliases, /IWPGW/BWF, /IWPGW/BPM, /IWPGW/TCM, Software version, RFC desination, Resource not found for the segment 'UserInfoCollection' , KBA , OPU-BSC-TGW , Task Gateway , CA-INB-FIO , Fiori UI for My Inbox Application , CA-INB , Fiori UI for My Inbox Application , Problem