Hi, I have two errors. I am sorry everyone but I am going crazy

Questions & Answers
1

CS0118, DestroyByContact.Game controller' is a field’ but a type' was expected and CS10621, Type object’ does not contain a definition for GameOver' and no extension method GameOver’ of type `object’ could be found (are you missing a using directive or an assembly reference?). Here is my script
{
public GameObject explosion;
public GameObject playerExplosion;
private object Gamecontroller;
private object gamecontroller;

void OnTriggerEnter(Collider other)
{
    if (other.tag == "Boundary")
    {
        return;
        Debug.Log(other.name);
    }
    
    Instantiate(explosion, transform.position, transform.rotation);
    if (other.tag == "Player")
    {
        if ((playerExplosion != null) && (gamecontroller != null))
        {
            Instantiate(playerExplosion, other.transform.position, other.transform.rotation);
            Gamecontroller.GameOver();
            gamecontroller = GameObject.GetComponent<Gamecontroller>();
        }
        Destroy(other.gameObject);
        Destroy(gameObject);
    }
}

}

2

@rizkyjr1

Both Gamecontroller and gamecontroller are plain UnityEngine objects. They are not components. The first thing you need to do is to replace private object with whatever components they are.