Xamarin MvvM交叉NullReferenceException从一开始就存在

我正在我刚刚创建的Xamarin项目上尝试MvvmCross，我遵循了所有的.txt文件说明，我第一次通过我的Windows Phone项目进行了尝试，但在初始化的某个部分，我不断收到一个模糊的NullReferenceException这不是内部异常，所以我不知道MvvMCross里面有什么坏东西

以下是MvvM诊断的输出

mvx:Diagnostic:  0.04 Setup: PlatformServices start
mvx:Diagnostic:  0.06 Setup: MvvmCross settings start
mvx:Diagnostic:  0.07 Setup: Singleton Cache start
mvx:Diagnostic:  0.07 Setup: Bootstrap actions
mvx:Diagnostic:  0.17 Setup: StringToTypeParser start
mvx:Diagnostic:  0.20 Setup: CommandHelper start
mvx:Diagnostic:  0.22 Setup: ViewModelFramework start
mvx:Diagnostic:  0.24 Setup: PluginManagerFramework start
mvx:Diagnostic:  0.25 Setup: App start
mvx:Diagnostic:  2.87 Setup: ViewModelTypeFinder start
mvx:Diagnostic:  2.88 Setup: ViewsContainer start
mvx:Diagnostic:  2.89 Setup: ViewDispatcher start
mvx:Diagnostic:  2.89 Setup: Views start
A first chance exception of type 'System.NullReferenceException' occurred in Cirrious.CrossCore.DLL
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in mscorlib.ni.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.Windows.ni.dll

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任何人有什么想法吗？

请显示您的设置代码异常的堆栈跟踪可能也很有用