Very simple newbie problem re object reference not set

Unity Engine
1

When my game loads I have an empty scene.

When i press options on ps4 pad my player character and 1st enemy appear. This worked fine.

I wanted to add in that some HUD text also appears when ‘options’ is pressed. So I set up a canvas, some UI text and set it to load at the same time.

At runtime when I hit options I am getting an object reference not set error, even though it is actually working and the text is appearing.

where am I going wrong?

using UnityEngine;
using UnityEngine.UI;

public class GameController : MonoBehaviour {

    private bool gameStarted = false;
    public Text text;

    // Use this for initialization
    void Start () {

    }

    // Update is called once per frame
    void FixedUpdate () {
        if (Input.GetButton ("PS4_Options") && gameStarted == false)
        {
            gameStarted = true;
            text.enabled = true;
            PlayerReady ();
        }
    }

    void PlayerReady(){

        GameObject player1 = Resources.Load ("Player") as GameObject;
        GameObject enemy = Resources.Load ("Sci-Fi_Soldier") as GameObject;
        Instantiate (player1);
        Instantiate (enemy);
    }

}

2

fixed it. I had attached the Text (as image above) in the cavas, but not in the Game Controller Object in the scene. I think I got this muddled up