I’m working on a rubiks cube algorithm trainer project on unity and I’m trying to create json files to store different collections of algorithms.
When I create the file i immediatly try to update my collections but I then get a NullReferenceException.

Here is all the code that is related to my issue.

public void AddCollection(string collectionName)
{
    string tempPath = new string(path + "/" + collectionName + ".txt");
    if (!File.Exists(tempPath))
    {
        File.WriteAllText(tempPath, GetBaseFileCollection(collectionName));
    }
    algManager.UpdateCollections();
    UpdateDropDown();
}

public string GetBaseFileCollection(string collectionName)
{
    string temp = "{rnt"collectionName" : "" + collectionName + ""rn}";
    return temp;
}

//algManager
public void UpdateCollections()
{
    algorithms.Clear();
    info = new DirectoryInfo(path);
    var fileInfo = info.GetFiles("*.txt");
    foreach (FileInfo file in fileInfo)
    {
        var textFile = Resources.Load<TextAsset>(file.Name.Replace(".txt", ""));
        algorithms.Add(JsonConvert.DeserializeObject<AlgorithmCollection>(textFile.text)); 
        //the error occurs on this line ^
}

And here is my AlgorithmCollection class that the json files deserializes into

public class AlgorithmCollection
{
    public string collectionName;

    [SerializeField]
    public List<AlgorithmBase> algorithms;
}

[System.Serializable]
public class AlgorithmBase
{
    public string algorithmName;

    public List<string> algorithm;

    public int cubeSize;

    [SerializeField]
    public List<Mover.Face> tilesColor;
}

I tried using VS2022 debug function and when entering the foreach UpdateCollection i do have the file but var textFile is null after Resources.Load.