title: Unity SteamVR Controller Initialization Issue on Build
body: <p>So I've created a game that functions perfectly in the editor, however when I build it, it throws me a NullReferenceException error. The Log tells me it is within the Initialize() function but since it is only an issue on build I don't
  really have any clue on how to fix it. I dont know what would be different between the build and the editor so I don't know how to bug test it effectively.</p>
  <p>Unity begins to initialize the controllers, but then throws this massive block of errors.</p>
  <pre><code>&lt;b&gt;[SteamVR]&lt;/b&gt; System.NullReferenceException: Object reference not set to an instance of an object.
    at Valve.VR.SteamVR_Input.Initialize (System.Boolean force) [0x00039] in E:\Repos\Mors Oculus\Assets\SteamVR\Input\SteamVR_Input.cs:166 
    at Valve.VR.SteamVR.CreateInstance () [0x000e7] in E:\Repos\Mors Oculus\Assets\SteamVR\Scripts\SteamVR.cs:207 
    at Valve.VR.SteamVR.Initialize (System.Boolean forceUnityVRMode) [0x00023] in E:\Repos\Mors Oculus\Assets\SteamVR\Scripts\SteamVR.cs:103 
    at Valve.VR.SteamVR_Behaviour_Pose.OnEnable () [0x00002] in E:\Repos\Mors Oculus\Assets\SteamVR\Input\SteamVR_Behaviour_Pose.cs:88 
  UnityEngine.DebugLogHandler:LogFormat(LogType, Object, String, Object[])
  UnityEngine.Logger:Log(LogType, Object)
  UnityEngine.Debug:LogError(Object)
  Valve.VR.SteamVR:CreateInstance() (at E:\Repos\Mors Oculus\Assets\SteamVR\Scripts\SteamVR.cs:217)
  Valve.VR.SteamVR:Initialize(Boolean) (at E:\Repos\Mors Oculus\Assets\SteamVR\Scripts\SteamVR.cs:103)
  Valve.VR.SteamVR_Behaviour_Pose:OnEnable() (at E:\Repos\Mors Oculus\Assets\SteamVR\Input\SteamVR_Behaviour_Pose.cs:88)
  </code></pre>
  <p>I don't really know what to change. Does anyone have any ideas?</p>