AssetBundleでScriptableObjectを読み込むとNull Referenceが出ます

解決したいこと

AssetBundleの読み込みでNull Referenceが出るので無くしたいです。

エラー：NullReferenceException: Object reference not set to an instance of an object
DeckEdit.LoadCardData (UnityEngine.GameObject asset) (at Assets/Scripts/DeckEdit.cs:35)
（３５行目はactionの呼び出し先です）

コード

C#
1public static void DoForAll(Action<GameObject> action)
2    {
3
4        int cnt = GameManager.Instance.GetMinionCount();
5        Debug.Log(Path.Combine(Application.streamingAssetsPath, "CardEntityList/cardentity"));
6        var myLoadedAssetBundle = AssetBundle.LoadFromFile(Path.Combine(Application.streamingAssetsPath, "CardEntityList/cardentity"));
7        if(myLoadedAssetBundle == null)
8        {
9            Debug.Log("Failed to load AssetBundle!");
10            return;
11        }
12        for(int i = 1; i <= cnt; i++){
13            var card = myLoadedAssetBundle.LoadAsset<GameObject>("Minion" + i);
14            Debug.Log(card);
15            action(card);
16        }
17        cnt = GameManager.Instance.GetSpellCount();
18        for(int i = 1; i <= cnt; i++){
19            var card = myLoadedAssetBundle.LoadAsset<GameObject>("Spell" + i);
20            action(card);
21        }
22
23    }