NullReferenceExeption

Hello friends,

can someone help me please? I have a script called Arrow wich holds the setttings of the arrow. There are multiple arrow gameobject in the scene.

I have another script called PlayerControl. with a array called arrows of type GameObject[] I created a list direction for the direction with can be set in the arrow script.

To get the direction i wanted to do this in PlayerControl:

 private void Start()
 {
         foreach (GameObject arrow in arrows)
         {
               Debug.Log("foreach called");
               string direction = arrow.GetComponent<Arrow>().direction;
 
               directions.Add(direction);
         }
   }

But when i want to try this i got the following error: NullReferenceException: Object reference not set to an instance of a object (assests/Playercontrol.cs:19)

Which is this line: directions.Add(direction);

I do not understand what the mistake is cause string direction is set.

greetz