NullReferenceException: Object reference not set to an instance of an object, even what I am trying to get is not MonoBehaviour

Questions & Answers
1

Hello!
I am making a game, And I got an error.
This is my code:

Code I am getting the error from:

DifficultyData Data = SaveData.LoadDifficulty();
DifficultyLevel = Data.DifficultyLevel;

DifficultyData:

[System.Serializable]
public class DifficultyData 
{
    public float DifficultyLevel;
    public DifficultyData(Difficulty DifficultyMuffin)
    {
        DifficultyLevel = DifficultyMuffin.DifficultyLevel;
    }
}

SaveData:

    public static void SaveDifficulty(Difficulty Difficulty)
    {
        BinaryFormatter Formatter = new BinaryFormatter();
        string Path = Application.persistentDataPath + "/Difficulty.save";
        FileStream Stream = new FileStream(Path, FileMode.Create);
        DifficultyData Data = new DifficultyData(Difficulty);
        Formatter.Serialize(Stream, Data);
        Stream.Close();
    }
 public static DifficultyData LoadDifficulty()
    {
        string Path = Application.persistentDataPath + "/Difficulty.save";
        if (File.Exists(Path))
        {
            BinaryFormatter Formatter = new BinaryFormatter();
            FileStream Stream = new FileStream(Path, FileMode.Open);
            DifficultyData Data = Formatter.Deserialize(Stream) as DifficultyData;
            Stream.Close();
            return Data;
        }
        else
        {
            BinaryFormatter Formatter = new BinaryFormatter();
            FileStream Stream = new FileStream(Path, FileMode.Create);
            int Data = 2;
            Formatter.Serialize(Stream, Data);
            Stream.Close();

            BinaryFormatter FormatterReturn = new BinaryFormatter();
            FileStream StreamReturn = new FileStream(Path, FileMode.Open);
            DifficultyData DataReturn = FormatterReturn.Deserialize(StreamReturn) as DifficultyData;
            Stream.Close();
            return DataReturn;
        }
    }

(This is to save btw)

2

Maybe it needs time to write to the file in the else statement.