NullReferenceException: Object reference not set to an instance of an object

[Kameen_Avery]

I am on Character Stats > Enemy Health Display lecture in the RPG Combat Course.

I am getting NullReferenceException: Object reference not set to an instance of an object with displaying the Percentage text for the Enemy Health Value.

I double checked the code fro Enemy Health Display and Fighter.cs but cannot get why the Percentage is not happening.

If I remove health.GetPercentage() from
GetComponent().text = String.Format("{0:0}%", health.GetPercentage());
it works, but when I add it I get the Null Reference. Here is the complete code

Enemy Health Display

namespace RPG.Combat

public class EnemyHealthDisplay : MonoBehaviour
{
    Fighter fighter;

    private void Awake()
    {
        fighter = GameObject.FindWithTag("Player").GetComponent<Fighter>();
    }

    private void Update()
    {
        if (fighter.GetTarget() == null)
        {
            GetComponent<Text>().text = "N/A";
        }
        
        Health health = fighter.GetTarget();
        GetComponent<Text>().text = String.Format("{0:0}%", health.GetPercentage());
    }
}

Fighter

namespace RPG.Combat

public class Fighter : MonoBehaviour, IAction, ISaveable
{
    [SerializeField] float timeBetweenAttacks = 1f;
    [SerializeField] Transform rightHandTransform = null;
    [SerializeField] Transform leftHandTransform = null;
    [SerializeField] Weapon defaultWeapon = null;
    Health target;
    float timeSinceLastAttack = Mathf.Infinity;
    Weapon currentWeapon = null;
    private void Start() 
    {
        if (currentWeapon == null)
        {
            EquipWeapon(defaultWeapon);
        }
    }
    private void Update()
    {
        timeSinceLastAttack += Time.deltaTime;
        if (target == null) return;
        if (target.IsDead()) return;
        if (!GetIsInRange())
        {
            GetComponent<Mover>().MoveTo(target.transform.position, 1f);
        }
        else
        {
            GetComponent<Mover>().Cancel();
            AttackBehaviour();
        }
    }
    
    public void EquipWeapon(Weapon weapon)
    {
        currentWeapon = weapon;
        Animator animator = GetComponent<Animator>();
        weapon.Spawn(rightHandTransform, leftHandTransform, animator);
    }
    
    public Health GetTarget()
    {
        return target;
    }
    
    private void AttackBehaviour()
    {
        transform.LookAt(target.transform);
        if (timeSinceLastAttack > timeBetweenAttacks)
        {
            // This will trigger the Hit() event.
            TriggerAttack();
            timeSinceLastAttack = 0;
        }
    }
    private void TriggerAttack()
    {
        GetComponent<Animator>().ResetTrigger("stopAttack");
        GetComponent<Animator>().SetTrigger("attack");
    }
    // Animation Event
    void Hit()
    {
        if(target == null) { return; }
        
        if (currentWeapon.HasProjectile())
        {
            currentWeapon.LaunchProjectile(rightHandTransform, leftHandTransform, target);
        }
        else
        {
            target.TakeDamage(currentWeapon.GetDamage());
        }
    }
    void Shoot()
    {
        Hit();
    }
    private bool GetIsInRange()
    {
        return Vector3.Distance(transform.position, target.transform.position) < currentWeapon.GetRange();
    }
    public bool CanAttack(GameObject combatTarget)
    {
        if (combatTarget == null) { return false; }
        Health targetToTest = combatTarget.GetComponent<Health>();
        return targetToTest != null && !targetToTest.IsDead();
    }
    public void Attack(GameObject combatTarget)
    {
        GetComponent<ActionScheduler>().StartAction(this);
        target = combatTarget.GetComponent<Health>();
    }
    public void Cancel()
    {
        StopAttack();
        target = null;
        GetComponent<Mover>().Cancel();
    }
    private void StopAttack()
    {
        GetComponent<Animator>().ResetTrigger("attack");
        GetComponent<Animator>().SetTrigger("stopAttack");
    }
    public object CaptureState()
    {
        return currentWeapon.name;
    }
    public void RestoreState(object state)
    {
        string weaponName = (string)state;
        Weapon weapon = UnityEngine.Resources.Load<Weapon>(weaponName);
        EquipWeapon(weapon);
    }
}

}

some help is needed.

[Kameen_Avery]

Never mind, we fix it in the next video