[LayaNative 2.0]Unity 导出预设报错

InvalidCastException: Cannot cast from source type to destination type.
r.a (UnityEngine.GameObject A_0, .i A_1, Boolean A_2)
r.a (UnityEngine.GameObject A_0, .i A_1, System.Collections.Generic.List`1 A_2)
r.a (UnityEngine.GameObject A_0, .i A_1, .i A_2, Vector3 A_3, Quaternion A_4, Vector3 A_5, System.String& A_6)
r.a (UnityEngine.GameObject A_0, System.String A_1, .i A_2, Boolean A_3, Boolean A_4, Boolean A_5)
r.i ()
r.k ()
r.b (System.String A_0)
LayaAir3D.exportResource (Boolean isDebug, Int32 Platformindex, System.String lastname)
LayaAir3D.ExportResources ()
LayaAir3D.OnGUI ()
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:232)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MethodBase.cs:115)
UnityEditor.HostView.Invoke (System.String methodName, System.Object obj) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:291)
UnityEditor.HostView.Invoke (System.String methodName) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:284)
UnityEditor.HostView.InvokeOnGUI (Rect onGUIPosition) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:251)