Got "ArgumentNullException: Argument cannot be null." When build on iOS

It's okay when I build with "Replace" but not okay when I build with "Append"

I try to figure out solutions, but it's all about UnityEditor.iOS.Xcode namespace;

I'm using Unity 5.0.0f4 Personal.

And Plugins are
- IOS Native
- Facebook SDK
- Unibill
- Smartlocalization
- Anti-Cheat Toolkit
- UnityRandom
- GoogleMobileAds
- GoogleAnalytics

Stacktrace is below....

Got "ArgumentNullException: Argument cannot be null." When build on iOS