XCODE 4 Build Error - ios

I am new in iOS app development. I have created an app in Sencha Touch 2. Then created a UIWebView in xcode and follow this blog to call sencha's index.html to xcode's UIWebView.
(Ref: http://www.innovaptor.com/blog/2013/05/06/create-a-sencha-touch-webapp-and-deploy-within-a-native-ios-app.html )
But when i am going to build the app, getting the following error.
Please help to solve this.
Thank You...

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dl.dropboxusercontent.com/u/13490919/FacebookiOSProb/Screenshot%202015-03-12%2014.53.29.png
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