Crash using System.Activator.CreateInstance (Unity 5.2.2 p3)

error=System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NotSupportedException: /Users/builduser/buildslave/unity/build/Tools/il2cpp/il2cpp/libil2cpp/icalls/mscorlib/System/String.cpp(24) : Unsupported internal call for IL2CPP:String::RedirectToCreateString - "All String constructors should be redirected to String.CreateString." at System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in :0 at System.Reflection.MonoCMethod.Invoke (BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in :0 at System.Activator.CreateInstance (System.Type type, BindingFlags bindingAttr, System.Reflection.Binder binder, System.Object[] args, System.Globalization.CultureInfo culture, System.Object[] activationAttributes) [0x00000] in :0 at System.Activator.CreateInstance (System.Type type, System.Object[] args, System.Object[] activationAttributes) [0x00000] in :0 at System.Activator.CreateInstance (System.Type type, System.Object[] args) [0x00000] in :0 at GameScript.Load_Read (System.Object& obj, System.IO.StreamReader stream) [0x00000] in :0 at GameScript.Load () [0x00000] in :0 at GameScript.Start () [0x00000] in :0 --- End of inner exception stack trace --- at System.Reflection.MonoGenericMethod.get_ReflectedType () [0x00000] in :0 at System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in :0 at System.Reflection.MonoCMethod.Invoke (BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in :0 at System.Activator.CreateInstance (System.Type type, BindingFlags bindingAttr, System.Reflection.Binder binder, System.Object[] args, System.Globalization.CultureInfo culture, System.Object[] activationAttributes) [0x00000] in :0 at System.Activator.CreateInstance (System.Type type, System.Object[] args, System.Object[] activationAttributes) [0x00000] in :0 at System.Activator.CreateInstance (System.Type type, System.Object[] args) [0x00000] in :0 at GameScript.Load_Read (System.Object& obj, System.IO.StreamReader stream) [0x00000] in :0 at GameScript.Load () [0x00000] in :0 at GameScript.Start () [0x00000] in :0 GameScript:Start() Some Idea about how to fix this? Thanks.