Vector3 from mouse position in scene view in edit mode

Hello,

I have been trying to learn how to get a Vector3 from mouse position from scene view in edit mode when I press a key. I have tried to combine it with custom Menu Items, which I would use to make scene editing more comfortable.

I have tried to use Camera.current() aswell as HandleUtility.GUIPointToWorldRay() to do that, yet when i try to use it, I get the message "Object reference not set to an instance of an object".

Can you tell me what I have been doing wrong?

Here are the both code versions that I tried to do the work with, I will be very thankful if you can help me with this.

 [MenuItem("My Commands/Custom Command _b")]
 static void c_Command()
 {
         Vector3 position = Camera.current.ScreenToWorldPoint (Event.current.mousePosition);
         Debug.Log (position);
 }
 
 [MenuItem("My Commands/Custom Command _b")]
 static void c_Command()
 {
         Vector3 position = HandleUtility.GUIPointToWorldRay(Event.current.mousePosition).origin;
         Debug.Log (position);
 }