SushmithaGowda,
Possibly due to no products being available but not sure. This might be something that requires you open a new ticket with support. Some things to consider:
1. Do you have products in your catalog?
2. How long ago where they updated?
3. What means are they being uploaded by: Feed or Mbox?
Mihnea Docea | Technical Support Consultant | Customer Experience | Adobe | (:: 1 (800) 497-0335