Unity ошибка при запуске игры

Ошибка Юнити: UnassignedReferenceException: The variable Sun of DayCycleManager has not been assigned. You probably need to assign the Sun variable of the DayCycleManager script in the inspector. Код, чтобы знающим было легче

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class DayCycleManager : MonoBehaviour
{
[Range(0, 1)]
public float TimeOfDay;
public float DayDuration = 30f;


public AnimationCurve SunCurve;
public AnimationCurve MoonCurve;
public AnimationCurve SkyboxCurve;

public Material DaySkybox;
public Material NightSkybox;


public Light Sun;
public Light Moon;

private float sunIntensity;
private float moonIntensity;


private void Start()
{
sunIntensity = Sun.intensity;
moonIntensity = Moon.intensity;
}

// Update is called once per frame
private void Update()
{
TimeOfDay += Time.deltaTime / DayDuration;
if (TimeOfDay > 1) TimeOfDay -= 1;


DynamicGI.UpdateEnvironment();
Quaternion quaternion = Quaternion.Euler(TimeOfDay * 360f, 180, 0);
Sun.transform.localRotation = quaternion;
Moon.transform.localRotation = Quaternion.Euler(TimeOfDay * 360f + 180f, 180, 0);
Sun.intensity = sunIntensity * SunCurve.Evaluate(TimeOfDay);
Moon.intensity = moonIntensity * MoonCurve.Evaluate(TimeOfDay);
}
}