Question Using the <Image> element to display sprites

I want to dynamicly display images in my UI which are stored in ScritableObjects as sprites.
But if i set the sprites to the respective <Image> element nothing happens (no error messages as well).
I do the same with text of <Label> elements and those work fine.

Code (CSharp):

1. using System;
2. using Data.Items;
3. using UnityEngine;
4. using UnityEngine.UIElements;
5.  
6. namespace UI
7. {
8.     public class WeaponEquipment : MonoBehaviour
9.     {
10.         private VisualElement _root;
11.  
12.         [SerializeField] Weapon weapon;
13.      
14.         private Image _rrtIcon;
15.         private Image _itemView;
16.  
17.  
18.         public void OnEnable()
19.         {
20.             // Get the UXML-Tree
21.             _root = GetComponent<UIDocument>().rootVisualElement;
22.  
23.             _rrtIcon = _root.Q<Image>("rrt-icon");
24.             _itemView = _root.Q<Image>("item-view");
25.         }
26.  
27.  
28.         // Update is called once per frame
29.         void Update()
30.         {
31.             _rrtIcon.sprite = weapon.rrt;
32.             _itemView.sprite = weapon.artwork;
33.         }
34.     }
35. }
36.  

I am using Unity 2020.3.11f1 with UI Builder 1.0.0-preview.14

 

I am an idiot. Everything works with this code. The problem just was that i'm an idiot.