I can able to login and do access the application as usual. But when I click the Returning To Homepage Using Link Home, got error like
You have encountered an unexpected error. Please contact the System Administrator for assistance."
When I have change my Self Service Personal Home Page mode from "Personal Home Page with Framework" to "Framework Only", everything work fine for me. Still I don't know the real cause of this issue.
Login as system administrator -> System Profile Values ->
Change profile option APPLICATIONS_HOME_PAGE (Self Service Personal Home Page mode) to 'Framework Only'
Logout and login again