Highscore doesn't work

Questions & Answers
1

I’m trying to have a highscore in the same script with the current score, but I can’t get past the “Object reference not set to an instance of an object” error.
There is something wrong with the score.text = "Score " + scoreValue; says it returns nothing.
Maybe is that it starts with 0. It’s not a normal score, it’s somewhat special, the score increases when an enemy gets killed, and enemies give a certain number.
I need help.

 public Text Highscore;
    public static int scoreValue = 0;
   
    Text score;


    void Start()
    {
        score = GetComponent<Text>();
        Highscore.text = "Highscore " + PlayerPrefs.GetInt("Highscore", 0).ToString();
    }

    void Update()
    {

        score.text = "Score " + scoreValue;
     
        {

            if (scoreValue > PlayerPrefs.GetInt("Highscore", 0))

            {
                PlayerPrefs.SetInt("Highscore", scoreValue);
            }
            Highscore.text = scoreValue.ToString();

        }
    }

}

2

Look up null reference exception, it means you didn’t assign a reference. If you provide the error that would really help, the error tells you exactly what is wrong and where for the most part. If I was to guess, I’d say score is not assigned… but hard to say…