Cannot compile when an extension is present.

[Tri-Divide]

Imported as a part of MultiSelectSegmentedControl install, my project has an extension.

I try to build the project and I get this error on the file "UIApplication+Sweeter.swift":

'shared' is unavailable in application extensions for iOS: Use view controller based solutions where appropriate instead.

This occurs on line 11:

public class func topViewController(base: UIViewController? = UIApplication.shared.keyWindow?.rootViewController) -> UIViewController? {

[yzoldan]

It also started happening to me and I don't have an extension. I'm developing in xcode 13 beta 3

[deprogram]

This is now broken in XCode stable (13).