To route the services activated under Activate ICF Services to the server where the UI runs, you need to configure the SAP Web Dispatcher. The following paths must be configured to be routed to the back-end server:

You need to apply 2106016. This note describes additional configuration steps are required to support applications which use the Design Studio Component, if SAP S/4HANA Finance deployments have a separate Gateway Front-End Server, which is different from the Back-End Server.

For more information about SAP Web Dispatcher, see http://help.sap.com/netweaver under  UI Add-On for SAP NetWeaver User Interface Add-On 2.0 for SAP NetWeaver Application Help SAP Fiori Launchpad Setting Up the Launchpad Configuring SAP Web Dispatcher .