Unable access to PWA

Hi,

I am facing a very strange error while accessing Project Server 2010. On accessing PWA Home Page and Project Cenetr following error message is displayed:

Microsoft.SharePoint.SPEndpointAddressNotFoundException: There are no addresses available for this application

SPEndpointAddressNotFoundException: There are no addresses available for this application

However, I am able to navigate to lists and other pages in the site. I am unable to resolve this issue. Any help in this regard will be appreciated.