Typhoon DI occurs EXC_BAD_ACCES

Question

I use Typhoon library to do dependency injection. I want to inject my navigator, but i get below error

"Thread 1: EXC_BAD_ACCESS (code=2, address=0x7fff89e06698)"

What can i do? Thanks!

My Assembly class:

public class CoreAssembly: TyphoonAssembly {

    public dynamic func navigator() -> AnyObject {
        return TyphoonDefinition.withClass(Navigatior.self) {
            (definition) in

            definition?.key = "NAVIGATOR"
            definition?.scope = .lazySingleton
            } as AnyObject
    }
}

My appdelegate:

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions:[UIApplication.LaunchOptionsKey: Any]?) -> Bool {

        let assembly = CoreAssembly().activated()
        let navigator = assembly.navigator() as! IITNavigation // and here is the EXC_BAD_ACCESS

        navigator.loadRootScreen("")
        return true
    }