Resolved The type or namespace name 'EventSystem' could not be found

so i'm following a tutorial on how to make a shop and after writing the code i got an error that said "The type or namespace name 'EventSystem' could not be found"

here's the code

Code (CSharp):

1. using UnityEngine;
2. using TMPro;
3.  
4. public class ShopManagerScript : MonoBehaviour
5. {
6.     public int[,] shopItems = new int[6, 6];
7.  
8.     public float PlayerCash;
9.  
10.     public TMP_Text PlayerCashTxt;
11.  
12.     void Start()
13.     {
14.         PlayerCashTxt.text = "$" + PlayerPrefs.GetFloat("PlayerCash").ToString();
15.  
16.         // IDs
17.         shopItems[1, 1] = 1;
18.         shopItems[1, 2] = 2;
19.         shopItems[1, 3] = 3;
20.         shopItems[1, 4] = 4;
21.         shopItems[1, 5] = 5;
22.         shopItems[1, 6] = 6;
23.  
24.         // Price
25.         shopItems[2, 1] = 1000;
26.         shopItems[2, 2] = 1000;
27.         shopItems[2, 3] = 1000;
28.         shopItems[2, 4] = 1000;
29.         shopItems[2, 5] = 1000;
30.         shopItems[2, 6] = 1000;
31.     }
32.  
33.     public void Buy()
34.     {
35.         GameObject ButtonRef = GameObject.FindGameObjectWithTag("Event").GetComponent<EventSystem>().currentSelectedGameObject;
36.     }
37. }

the code is in the empty GameObject ShopManager

 

Nevermind, i just needed to add `using UnityEngine.EventSystems`

 

Here for me even adding the EventSystems library still doesn't recognize the currentSelectedGameObject

 

UnityEngine.UI is now a package:

https://forum.unity.com/threads/where-did-the-ui-option-in-the-create-menu-go.1134796/#post-7290742

Annoying possible issue circa October 2021:

https://forum.unity.com/threads/unityeditor-ui-csproj-not-found.1177432/

 

I just managed to remove and install UnityEngine.UI again but it didn't solve for me, I tested the same script on another version of unity and it worked, really the problem is Unity version 2020.3.19 in my case