Hi SelvaRaj,
As per below link, the new base url for SFSF is:
https://apisalesdemo8.successfactors.com/odata/v2/
Can you check if you are using correct link, after creating destination check availability or ping works fine if any auth. issue
SuccessFactors(SFSF) Extension with HANA Cloud Platform - Mobile Services
Regards,
Madhu Sudhan