Public Text UI variable not showing on inspector

Hey I've been having problems with using the text UI features in vs, first is UnityEngine.UI not being recognized (tried fixing that with many solutions but nothing worked) so I looked for other options and moved onto using UnityEngine.UIElements and coded stuff to make it so my text on the UI can get updated depending on a unit's actions. But my public variables for the text aren't showing up on the inspector and it doesn't show an error so I have no idea why. I tried Label and Text Element. Any help? My VS version is 1.1.3 and Unity version is 2019.3.9f1

EDIT: to be clear, only the Label and TextElement variables aren't showing up.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.UIElements;
5. using UnityEngine.UI; //Still no idea why this doesn't work
6.  
7. public class ResourceManager : MonoBehaviour
8. {
9.  
10.     public float gold;
11.     public float maxGold;
12.     public float wood;
13.     public float maxWood;
14.     public float population;
15.     public float maxPopulation;
16.  
17.     public Label goldDisp;
18.     public TextElement woodDisp;
19.     public TextElement populationDisp;
20.  
21.     // Start is called before the first frame update
22.     void Start()
23.     {
24.      
25.     }
26.  
27.     // Update is called once per frame
28.     void Update()
29.     {
30.         goldDisp.text = "" + gold + "/" + maxGold;
31.  
32.         //if(gold >= maxGold) //This makes it so that if somebody keeps collecting over max limit, it will simply be deleted and won't go any higher.
33.         //{
34.         //    gold = maxGold;
35.         //}
36.     }
37. }

optional: the error for the UnityEngine.UI error is "The type or namespace name 'UI' does not exist in the namespace 'UnityEngine' (are you missing an assembly reference?)

 

Check this ancient link for some recent activity, just a few weeks back:

https://forum.unity.com/threads/the...ist-in-the-namespace-unityengine-help.398634/

Scroll down.

 

I looked at the forum and tried the solutions and none of them worked, however I tried using unity 2017.4.28f1 and it worked. The UnityEngine.UI was now there to use. It seems that the 2019.3.9f1 version I'm using now uses .UIElement instead of .UI. I took the working 2017 version and updated it to the 2019 version and it stopped working, guess I'll need to learn UIElement now.