Buttons in a Scroll View not working

Questions & Answers
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1

I have created a Scroll View in Unity, and wanted to make the elements inside clickable. It would function as a level select menu. The level panels are instantiated from a prefab.

As a first approach I added an IPointerClickHandler to the parent object.

using TMPro;
using UnityEngine;
using UnityEngine.EventSystems; 

public class ScrollViewItem : MonoBehaviour, IPointerClickHandler
{
  
    public TextMeshProUGUI title, length;
    
    public void initialize(string titleInit, float lengthInit) 
    { 
        title.text = titleInit; 
        length.text = "Length: " + lengthInit.ToString("F0") + "s"; 
    }
    
    public void OnPointerClick(PointerEventData eventData) 
    {
        Debug.Log("hello");
    }
}

it worked fine until yesterday, and today my unity editor crashed because of CPU issues i assume, and now this does not work anymore. For some reason the IPointerClickHandler does not react at all, and also if I add a Button to the prefab, the button stops working as well.