stealth project stopped when "press" play

hey guys sorry for my poor english but i hope u can help me pleas .

could you tell me whats my error and show me how can i fix it pleas!!!

[1]: /storage/temp/56932-prob1.jpg

 void Awake ()
     {
         leftOuterDoor = GameObject.Find("door_exitouter_left_001").transform;
         rightOuterDoor = GameObject.Find("door_exitOuter_right_001").transform;
         leftInnerDoor = GameObject.Find("door_exitInner_left_001").transform;
         rightInnerDoor = GameObject.Find("door_exitInner_right_001").transform;
         
         leftClosedPosX = leftInnerDoor.position.x;
         rightClosedPosX = rightInnerDoor.position.x;
     }
 
     void MoveDoors (float newLeftXTarget, float newRightXTarget)
     {
         float newX = Mathf.Lerp(leftInnerDoor.position.x, newLeftXTarget, doorSpeed * Time.deltaTime);
         
         leftInnerDoor.position = new Vector3(newX, leftInnerDoor.position.y, leftInnerDoor.position.z);
         
         newX = Mathf.Lerp(rightInnerDoor.position.x, newRightXTarget, doorSpeed * Time.deltaTime);
         
         rightInnerDoor.position = new Vector3(newX, rightInnerDoor.position.y, rightInnerDoor.position.z);
     }
 
     public void DoorFollowing ()
     {
         MoveDoors(leftOuterDoor.position.x, rightOuterDoor.position.x);
     }