NullReferenceException

Hi, i have a few problems with my scrips and i´m very new to unity and C maybe you can help me.

NullReferenceException: Object reference not set to an instance of an object
ERH.CardType.OnSetType (ERH.CardViz viz) (at Assets/Complex/Scripts/Cards/CardType.cs:13)
ERH.AttackCard.OnSetType (ERH.CardViz viz) (at Assets/Complex/Scripts/Cards/AttackCard.cs:11)
ERH.CardViz.LoadCard (ERH.Card c) (at Assets/Complex/Scripts/Cards/CardViz.cs:25)
ERH.CardViz.Start () (at Assets/Complex/Scripts/Cards/CardViz.cs:15)

Here ist the script CardType.cs

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.
5. namespace ERH
6. {
7. public abstract class CardType : ScriptableObject
8. {
9. public string typeName;
10.
11. public virtual void OnSetType(CardViz viz)
12. {
13. Element t = Settings.GetResourcesManager().typeElement;
14. CardVizProperties type = viz.GetProperty(t);
15. type.text.text = typeName;
16 }
17. }
18.}

Thanks in advance!

 

Either Settings (unless it's static) or the results of GetResourcesManager() is null, which means it doesn't hold a proper value. You must have missed assigning it somewhere else.