Fiori On Portal Exception

Hello,

when i click on a tile i get the error "Could not open app. Try again later.".

when I looked at javascript sources ,there is an error as

TypeError: Unable to get property 'setContent' of undefined or null reference

When I debug the code , there is an error in App.Controller.js

this.getView().byId("Wrapper").setContent(body) line

Here , this.getView().byId("Wrapper") is undefined, for that reason it gives the exception.

appreciate ur helps,

Regards,