Xcode 9.2 has released today. now my iPhone uses the iOS 11.2 so I tried to update Xcode to 9.2.
but it was failed. Every time I tried, the 'An unknown error has occurred' is appeared with 'There was an error in the App Store. Please try again later. (13)' message.
what I tried:
- delete appstore cookies
- delete com.apple.appstore.plist
what should I do? please help me 😟