Activate and Maintain Services : Tcode /N/IWFND/MAINT_SERVICE

1. Run the URL.
2. Click on F12 or run Tcode /n/iwfnd/error_log.
3. Clear the Console and Network ( do not close this debugger window).
4. Click on Fiori Application.
5. Copy the service name.
6. Go to tcode  /N/IWFND/MAINT_SERVICE.
7. Click on Filter and enter technical service Name *Service name*.
8. Click on Technical Service Name ( If found ).
9. At the bottom, there is ICF Name drop-down, select Activate/ deactivate.