Bug AddListener in DebugUIBuilder.cs not working

Hello everyone!
I'm new to working with VR on unity. I'm trying to open a VR project while using the Oculus Quest 2 as a headset, but i keep receiving the following message:

Assets\Oculus\SampleFramework\Core\DebugUI\Scripts\DebugUIBuilder.cs(312,22): error CS1061: 'object' does not contain a definition for 'AddListener' and no accessible extension method 'AddListener' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?)

and it referes to this segment of code:

Code (CSharp):

1.  public RectTransform AddButton(string label, OnClick handler = null, int buttonIndex = -1, int targetCanvas = 0, bool highResolutionText = false)
2.   {
3.     RectTransform buttonRT = null;
4.     if(buttonIndex == -1)
5.         buttonRT = GameObject.Instantiate(buttonPrefab).GetComponent<RectTransform>();
6.     else
7.         buttonRT = GameObject.Instantiate(additionalButtonPrefab[buttonIndex]).GetComponent<RectTransform>();
8.  
9.     Button button = buttonRT.GetComponentInChildren<Button>();
10.     if(handler != null)
11.       button.onClick.AddListener(delegate { handler(); });
12.  
13.  
14.       if(highResolutionText){
15.         ((TextMeshProUGUI)(buttonRT.GetComponentsInChildren(typeof(TextMeshProUGUI), true)[0])).text = label;
16.       }
17.       else{
18.         ((Text)(buttonRT.GetComponentsInChildren(typeof(Text), true)[0])).text = label;
19.       }
20.  
21.     AddRect(buttonRT, targetCanvas);
22.     return buttonRT;
23.   }
24.  
25.   public RectTransform AddLabel(string label, int targetCanvas = 0)
26.   {
27.     RectTransform rt = GameObject.Instantiate(labelPrefab).GetComponent<RectTransform>();
28.     rt.GetComponent<Text>().text = label;
29.     AddRect(rt, targetCanvas);
30.     return rt;
31.   }

I would very much appreciate if someone could suggest a solution to this error