IOS project showing error “An internal error occurred. Editing functionality may be limited” on xcode 7.1

Question

I just created one new cordova ios project via CLI, and i opened that project in Xcode 7.1 and while running on simulator am getting some error on mainViewController.xib, if

Answer 1

I changed Xcode - Preferences - Text Editing, ticked on 'Code Folding Ribbon' and 'Focus code blocks on hover'.

Cleaned the project and it removed the source editing error.