Post upgrade SAP BW 7.4; Internet Communication Framework (ICF) services will be inactivated due to security reasons. The services needs to be activated on application-related basis only, and it can be done manually (Right click then Activate),Apart from BASIS ,Even SAP BW Team also have access and they can do it manually by following the URL given in the error screen through transaction SICF.
In SICF Tcode...You can get most of the services needs to be activated post BW 7.4 upgrade under default_host/sap/public and the tree will open. Choose Services ….Right click…..Activate..the issue will be resolved.