Xcode 9 Beta Use of undeclared type 'SKError'

I just tried to build my project in Xcode 9 beta and I'm getting an error that says:

Use of undeclared type SKError

This error is in a CocoaPod called SwiftyStoreKit.

I tried cleaning the project with no success.

Any ideas on how to fix this? I didn't hear anything about changes to SKError in Xcode 9, iOS 11, or Swift 4. Although I haven't converted my project to Swift 4 yet. Am I missing something?

Solution

This is a known issue in the SwiftyStoreKit framework. As a quick fix, trying switching to the swift-4.0 branch instead:

pod 'SwiftyStoreKit', :git => 'https://github.com/bizz84/SwiftyStoreKit', :branch => 'swift-4.0'

edit your Podfile, with the line above, then run pod install again.

By the way, according to the aforementioned issue, this looks like a bug on Apple's side ;(