title: The type or namespace name `PostProcessing' does not exist in the namespace `UnityEngine.Rendering'
body: <p>Do someone know how to fix this? I got this error after importing Cinemachine from the Unity Asset Store. I'm using Unity 2018.1.0f2 and have no problems with 2017.3.1f1</p>
  
  <p>Error</p>
  
  <p>The type or namespace name <code>PostProcessing</code> does not exist in the namespace <code>UnityEngine.Rendering</code></p>