AssetBundle Manager Doesn't fetch assetBundle on Andriod

I'm trying to implement AssetBundles using AssetBundleManager it's working fine on PC but, on Android it fails with following error

Here's the code i'm using

Code (CSharp):

1.  using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using AssetBundles;
5. public class loadprefabs : MonoBehaviour
6. {
7.      IEnumerator Start()
8.      {
9.          yield return StartCoroutine(initilize());
10.          yield return StartCoroutine(loadObjs());
11.      }
12.      IEnumerator initilize()
13.      {
14.            AssetBundleManager.SetSourceAssetBundleURL("http://www.<myDomain>.com/cloud/");
15.           var request = AssetBundleManager.Initialize();
16.           if (request != null)
17.             yield return StartCoroutine(request);
18.       }
19.       IEnumerator loadObjs()
20.      {
21.          AssetBundleLoadAssetOperation req = AssetBundleManager.LoadAssetAsync("prefabs", "Cube", typeof(GameObject));
22.           if (req == null)
23.              yield break;
24.          yield return StartCoroutine(req);
25.           GameObject prefab = req.GetAsset<GameObject>();
26.           if (prefab != null)
27.              GameObject.Instantiate(prefab);
28.       }