Unity UI Please Help! I cant seem to use any UI elements even if i use UnityEngine.UI

I'm trying to use the Slider function in order to edit the value of my health bar. but for some reason, the Slider variable doesn't work and I just get errors. Heres the code

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.UI;
5.  
6. public class Healthbar : MonoBehaviour
7. {
8.     public Slider slider;
9.  
10.     public void SetMaxHealth(int health)
11.     {
12.         slider.maxValue = health;
13.         slider.Value = health;
14.     }
15.  
16.     public void SetHealth(int health)
17.     {
18.         slider.value = health;
19.     }
20. }
21.  

 

What are the actual errors you are getting?

Based on my quick skim of this documentation I don't think "maxValue" or "Value" are things that Sliders have. (Note that capitalization is important; "value" and "Value" are not the same.)

 

it says that the UI component Slider doesn't exist

 

Don't paraphrase errors unless you understand what's causing them. Copy/paste the actual error message.