Unity [2D] Following GamesPlusJames Endless-Runner The type or namespace name `PlatformList' could not be found. Are you missing an assembly reference?

Here’s my code …
using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class GameManager : MonoBehaviour {

	public Transform platformGenerator;
	private Vector3 platformStartPoint;

	public PlayerController thePlayer;
	private Vector3 playerStartPoint;

	private PlatformDestroyer[] platforms;

	private ScoreManager theScoreManager;

	public DeathMenu theDeathScreen;

	public Platformlist platformList;

	// Use this for initialization
	void Start ()
	{
		playerStartPoint = thePlayer.transform.position;
		platformStartPoint = platformGenerator.position;
	}

	// Update is called once per frame
	void Update () {

	}

	public void RestartGame()
	{
		theScoreManager.scoreIncreasing = false;
		thePlayer.gameObject.SetActive(false);

		//StartCoroutine("RestartGameCo");
	}

	public void Reset()
	{
		platformList = FindObjectOfType<PlatformDestroyer> ();
		for (int i = 0; i < platformList.Length; i++) {
			platformList *.gameObject.SetActive (false);*
  •  }*
    
  •  thePlayer.transform.position = playerStartPoint;*
    
  •  platformGenerator.position = platformStartPoint;*
    
  •  thePlayer.gameObject.SetActive (true);*
    
  •  theScoreManager.scoreCount = 0;*
    
  •  theScoreManager.scoreIncreasing = true;*
    
  • }*

_ /*public IEnumerator RestartGameCo()_

  • {*
  •  scoreManager.scoreIncreasing = false;*
    
  •  thePlayer.gameObject.SetActive(false);*
    

_ /*yield return new WaitForSeconds(0.5f);_

  •  thePlayer.transform.position = playerStartPoint;*
    
  •  platforms = FindObjectsOfType<PlatformDestroyer>();*
    
  •  for(var i=0; i< platforms.Length; i++)*
    
  •  {*
    

_ platforms*.gameObject.SetActive(false);_
_
}*_

* platformGenerator.position = platformStartPoint;*

* thePlayer.gameObject.SetActive(true);*
* scoreManager.scoreCount = 0;*
* scoreManager.scoreIncreasing = true;*

_ } /_
_
}*_
no idea why its doing this error… help please

PlatformList does not exist in your solution or is in a namespace.
So, search if you have that class defined in your solution, if not, here is your problem. If the class exists, check that you either put the proper using statements at the beginning of your file or add them before the use of PlatformList.