dyld: Symbol not found: _OBJC_CLASS_$_ASIdentifierManager

Hi guys, I am trying to port my unity 3d project from Android(Build on Windows) to iOS (on my iMac)

**Note: I am initiating the ad myself using the SDK.

I followed a YouTube guide

But his is for app publishing, mine is for simulator, so I've selected Simulator SDK as my Target SDK.

However, when I want to do a test run on xcode simulator, I get this error

Which I dun really understand what is going on, I've searched google search and some say it's UnityAds that's causing the problem. I've tried their solution such as re-importing, turning off ads service and reimport, it doesn't work at all..

I am using Unity 2017.1.0f3 Personal and xCode 7.0(7A220)


UPDATE : I tried building a new project on my iMac and enable the unity ads via service(without importing the SDK), everything works, but when I tried to import SDK, it doesn't work, I will get the symbol not found error, is this a bug or am I missing something? I need to use the SDK to manually initialize the ads because I do not want the app to initialize everytime the app opens up(it takes up quite a lot of bandwidth if they keep opening and closing app)