[SOLVED] LoadAssetAsync never be completed for external storage of Oculus GO

Hello,

I am trying to load an asset from the local storage of my Oculus GO.
I made an asset bundle and placed it to Oculus GO's local storage.
I built and ran the application and watched the log in the VR scene then I found that asset bundle was loaded but the asset was not loaded from the asset bundle. I gave my app external storage access permissions of course.
When I use Application.streamingAssetPath, then my app works without any issue but I like to use external storage because I want players to add their own contents.
Does anyone have any idea or advice how I can fix this issue?
FYI, below is the code I wrote.

Code (CSharp):

1.         bundleUrl = "file:///sdcard/" + assetName;
2.         AssetBundleCreateRequest request = AssetBundle.LoadFromFileAsync(bundleUrl);
3.  
4.         yield return new WaitWhile(() => request.isDone == false);
5.  
6.         if (request == null)
7.         {
8.             Debug.Log("Request is null");
9.             assetText.text = "Asset Bundle not Loaded";
10.         } else
11.         {
12.             Debug.Log("Asset Bundle Loaded");
13.             assetText.text = "Asset Bundle Loaded";
14.         }
15.  
16.         AssetBundle assetBundle = request.assetBundle;
17.         AssetBundleRequest actor = assetBundle.LoadAssetAsync<GameObject>(assetName);
18.  
19.         yield return new WaitWhile (() => actor.isDone == false) ;
20.  
21.         if (actor == null)
22.         {
23.             assetText.text = "asset is null";
24.             if (System.IO.File.Exists(bundleUrl) == false)
25.             {
26.                 assetText.text = "Cannot access the File";
27.             }
28.  

[Edit] After messing around a little more, I found that below method works.

Code (CSharp):

1.         UnityWebRequest www = UnityWebRequestAssetBundle.GetAssetBundle(string path);
2.  

 

I can load the asset but the lightmap is missing when single pass, multi-pass is fine.
unity 2017.4.5f1

 

Your asset bundle is not in the StreamingAssets folder, right?
Could you tell me where you located your asset bundle and how you load it, please?