Xcode
cannot load UIKit
module. I got this error message:
// import UIKit - Cannot load underlying module for 'UIKit'
I downloaded this GitHub source project: ARMuseum.
My xcode version:
Version 9.4 beta
In Xcode 9.4.1 in macOS High Sierra 10.13.6 everything works fine.
It's definitely a bug of Xcode 9.4 beta.
So, install the latest public version of Xcode to get rid of this bug.