title: Unity3D build stuck on scene 0
body: <p>after I remove the <code>Google Mobile Ads</code> plugin, my projects build get stuck at <strong>"Building Scene 0"</strong></p>
  
  <p><a href="https://i.stack.imgur.com/87kZy.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/87kZy.png" alt="enter image description here"></a></p>
  
  <p>Very Strange:</p>
  
  <p>1)I have tried to create <strong>a new blank scene</strong> and remove all other scenes but still <strong>got this stuck</strong>...</p>
  
  <p>2) <strong>I have tried to rollback the projects</strong> and use assets that previously successfully build, <strong>but now it can not build and get stuck too.</strong></p>
  
  <p>Is there any way to debug this thing? or way to fix this?</p>
  
  <p><strong>Note: I'm using Unity 2019.2.10f1</strong></p>
  
  <p>Do I need to reinstall Unity?</p>
  
  <p>Editor Log:</p>
  
  <blockquote>
    <p>Opening scene 'Assets/z_scene/ID/Main/EN_Main_Menu_NEW.unity'
    LightmapEditorSettings: switching bake backend from 1 to 0.
    Unloading 154 Unused Serialized files (Serialized files now loaded: 0)
    Loaded scene 'Assets/z_scene/ID/Main/EN_Main_Menu_NEW.unity'
      Deserialize:            364.249 ms
      Integration:            25.758 ms
      Integration of assets:  289.124 ms
      Thread Wait Time:       49.159 ms
      Total Operation Time:   728.290 ms
    System memory in use before: 135.9 MB.
    System memory in use after: 132.5 MB.</p>
    
    <p>Unloading 132 unused Assets to reduce memory usage. Loaded Objects now: 4171.
    Total: 25.561800 ms (FindLiveObjects: 1.641300 ms CreateObjectMapping: >0.499200 ms MarkObjects: 22.025800 ms  DeleteObjects: 1.393500 ms)</p>
    
    <p>[00:00:00] Enlighten: Precompute started.
    Setting up 1 worker threads for Enlighten.
     Thread -> id: 1a10 -> priority: 1 
    [00:00:00] Enlighten: Finished 1 Layout Systems job (0.00s execute, 0.00s >integrate, 0.02s wallclock)
    [00:00:00] Enlighten: Finished 1 Tetrahedralize Probes job (0.02s execute, >0.00s integrate, 0.03s wallclock)
    [00:00:00] Enlighten: Precompute took 0.045671 seconds.
    Enlighten scene contents:   0 geometries.   0 instances.   0 systems.   0 probe groups.   0 cube maps. Scene is up-to-date.
    [00:00:00] Enlighten: Bake started.
    [Optix] removing context.
    [PathTracer] building lightmap data asset.
    [PathTracer] Total bake time: 0.014201, raw bake time: 0.000000
    gi::BakeBackendSwitch: Clear() active clients.
    [EnlightenBakeManager] m_Clear = false;
    [PathTracer] building lightmap data asset.
    gi::BakeBackendSwitch: switching bake backend from 3 to 0.
    [PathTracer] building lightmap data asset.
    [00:00:01] Enlighten: Finished 2 Bake Runtime jobs (0.22s execute, 0.00s >integrate, 0.24s wallclock)
    [00:00:01] Enlighten: Bake took 0.237899 seconds.
    [00:00:01] Enlighten: LightingDataAsset started.
    Collecting Enlighten data</p>
  </blockquote>