GetInt can only be called from the main thread on Android

Hi,

I'm facing some problems recently with Android Build. I have a class to handle save locally, iCloud and Google Snapshot. It works like this:

 public class DataCloudPrefs
 {
         public static void SetInt(string key, int value)
         {
             #if CLOUDDATA_IMPLEMENTED
     
                 #if UNITY_IOS
                 iCloudBinding.setInt( value, key );
                 #elif UNITY_ANDROID
                 snapshotKeys.Add(key, value);
                 #endif
     
             #endif
     
             PlayerPrefs.SetInt(key, value);
             PlayerPrefs.Save();
         }
 
     public static int GetInt(string key)
     {
         #if CLOUDDATA_IMPLEMENTED
 
             #if UNITY_IOS
             return P31Prefs.getInt(key);
             #elif UNITY_ANDROID
             return int.Parse(snapshotKeys[key].ToString());
             #endif
 
         #endif
 
         return PlayerPrefs.GetInt(key);
     }
  }

So, I implemented a rewarded video on my game. On OnComplete function I call, for example:

 GameController.Coins += 100;

which goes something like this:

 public class GameController : MonoBehaviour
 {
    private static int coins = 0;
 
    public static int Coins
    {
       get { return SaveController.Coins; }
       set 
       { 
            coins = value;
            SaveController.Coins = coins; 
       }
    }
 }

 public class SaveController : MonoBehaviour
     {
        public static int Coins
        {
           get { return DataCloudPrefs.GetInt("COINS"); }
           set { DataCloudPrefs.SetInt("COINS", value); }
        }
     }

This runs normally on Unity, on iOS, but on Android it returns me this error:

 10-18 18:48:13.991: E/Unity(24084): GetInt can only be called from the main thread.
 10-18 18:48:13.991: E/Unity(24084): UnityEngine.PlayerPrefs:GetInt(String, Int32)
 10-18 18:48:13.991: E/Unity(24084): UnityEngine.PlayerPrefs:GetInt(String) (at /Users/builduser/buildslave/unity/build/artifacts/generated/common/runtime/PlayerPrefsBindings.gen.cs:49)
 10-18 18:48:13.991: E/Unity(24084): DataCloudPrefs:GetInt(String) (at /Users/jota/GitHub/OvertimeStudios/CreepyBuster/Assets/Standards/Social Gaming Network/Cloud Data/DataCloudPrefs.cs:242)
 10-18 18:48:14.251: I/Unity(24084): ArgumentException: GetInt can only be called from the main thread.
 10-18 18:48:14.251: I/Unity(24084):   at UnityEngine.PlayerPrefs.GetInt (System.String key) [0x0000a] in /Users/builduser/buildslave/unity/build/artifacts/generated/common/runtime/PlayerPrefsBindings.gen.cs:49 
 10-18 18:48:14.251: I/Unity(24084):   at DataCloudPrefs.GetInt (System.String key) [0x00010] in /Users/jota/GitHub/OvertimeStudios/CreepyBuster/Assets/Standards/Social Gaming Network/Cloud Data/DataCloudPrefs.cs:242 

Why is this?