Activating the ICF Service to Display the Results List 
The results list of the search contains links to the found objects. The links are constructed in the SAP system using a service of the Internet Communication Framework (ICF) shipped by SAP. In the default setting, the ICF service is inactive; you have to activate it to use the Help Center search function.
Launch transaction SICF in the SAP system.
Make sure that the hierarchy type SERVICE is set and choose
(Execute F8).
In the Virtual Hosts/Services column, choose .
Activate the service hc.
More information: Activating/Deactivating ICF Services