Xcode 14 beta: NSString function does not return string type

Just by importing a UIKit onto a Objective C++ code gives me this error

What does the code that triggers the error look like?

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

I have the same problem, and my director helped me to fix it by the following:

1. Open Preference -> Locations -> Derived Data

2. Go to the Derived Data path and delete all the folders

3. Clean Build Folder and try again

I hope you find this information helpful.