Unity keeps rejecting my code, even when there are no errors

Questions & Answers
1

So, I am a novice making a game in unity, however, after fixing a few errors, Unity now refuses to load my script C# because it is saying “The associated script cannot be loaded. Please fix any compiler errors and assign a valid script.” I cannot find any errors in my script however, so can you please help? (This script is meant to control the player’s movement, and keep track of score)

EDIT: Not sure if this helps, but an exception called System.NullReferenceException was also thrown

Another edit : The compiler gives no errors

Here is my code:

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
public class Movement : MonoBehaviour 
{
	private int points;
	private Rigidbody rb;
	public float speed;
	public Text scoredis;
	void Start()
	{
		rb = GetComponent<Rigidbody>();
		points = 0;
		PointDisplay();
	}
	void FixedUpdate()
	{
		
		float moveHorizontal = Input.GetAxis("Horizontal");
		float moveVertical = Input.GetAxis("Vertical");
		Vector3 movement = new Vector3(moveHorizontal, 0.0f, moveVertical);
		rb.AddForce(movement * speed);

	}
	void OnTriggerEnter(Collider other) 
	{
		if (other.gameObject.CompareTag("Pickup"))
		{
			other.gameObject.SetActive(false);
			++points;
			PointDisplay();
		}	
	}

	void PointDisplay()
	{
		scoredis.text = "Score: " + points.ToString();
	}
}
2

Figures! I found the answer myself… after I posted here and asked various people for help! As I looked into unity I saw that there is no UI object that is referenced for public Text scoredis; So what I had to do was drag the UI element into the variable scoredis in unity. The entire time scoredis had no object so as I was trying to update the score value, I was updating nothing. I hope this helps anyone else.