title: Issues in AR App built in Unity using Vuforia SDK
body: <p>I have created a small application in Unity using Vuforia SDK. It recognizes an image and projects a 3D model on the top of it.
  I am able to run the app in Unity Editor but getting an issue when I try to create an iOS project and run the app on device.</p>
  
  <p>I am trying to run it on iPhone X (iOS version 11.3) and this is the error that I am getting when the app starts:</p>
  
  <blockquote>
    <p>VideoBackgroundConfig with screen size of zero received, skipping
    config step</p>
  </blockquote>
  
  <p>I searched the issue on net but the solutions that I got didn't work. I am using Vuforia version 7.0.47, Unity version 2017.3.1f1 Personal and XCode version 9.3 beta 4.</p>
  
  <p>Could someone please provide some pointers?</p>