question

Why? i can't understand why i get all the time this error. I'm using a TextMeshProUGUI to obtain the username, email and password but always I get this error.

The weird case is, when I put a string with hardcoding inside the function AddUsernamePassword() it Works with the same name i typed in the input field.

public void SingInNewAccountPlayFab(string username, string password, string email)
    {
        Debug.Log("username: " + username);
        Debug.Log("password: " + password);
        Debug.Log("email: " + email);
        PlayFabClientAPI.AddUsernamePassword(new AddUsernamePasswordRequest()
        {
            Username = username, // if i type Username = "Whatever" Works but It isn't 
					if i take it from  username parameter
            Password = password,
            Email = email
        }, result =>
        {
            if (SceneManager.GetActiveScene().name == "Menu")
            {
                GameObject menu = GameObject.Find("OptionsPanel");
                menu.GetComponent<UIPlayfabRegister>().WritePopUpPanel("Account added, now you will preserve all your content.");
                menu.GetComponent<UIPlayfabRegister>().CloseIfRegistered();
                UserSettingsRepository.Instance.UserData.username = username;
                UserSettingsRepository.Instance.UserData.password = password;
                UserSettingsRepository.Instance.UserData.email = email;
                UserSettingsRepository.Instance.Save();
            }
            AuthenticateWithPlayFabClient(username, password);
        }, OnPlayFabError);
        
    }