Null Object Reference although the object EXISTS

first of all, sorry for my English.
now, I have a systemfor a password.
it is made out of 2 scripts: one for the door, and one for the password itself
there is a third script on the capera that triggers everything
these are the scripts (with the relevant parts only):
Camera Script:

Code (CSharp):

1. if (hit.collider.tag == "Door" || hit.collider.tag == "Vents")
2.                 {
3.                     CrosshairActive();
4.                     hitObj = hit.collider.gameObject;
5.                     if (Input.GetKeyDown(KeyCode.E))
6.                     {
7.                         if (hitObj.GetComponent<DoorOpen>().lockSystem.password != null)
8.                             Debug.Log("Pass Exists");
9.                         else
10.                             Debug.Log("Pass Does Not Exist");
11.  
12.                         if (hitObj.GetComponent<DoorOpen>().lockSystem.password != null) //BUGGED
13.                         {
14.                             Debug.Log("Pass Exists");
15.                             hitObj.GetComponent<DoorOpen>().lockSystem.password.GetComponent<PasswordSystem>().passwordCanvas.gameObject.SetActive(true);
16.                         }
17.                         else if (hitObj.GetComponent<DoorOpen>().CheckIfCanOpen())
18.                             hitObj.GetComponent<DoorOpen>().OpenDoor();
19.                     }
20.                        
21.                 }

Door Script:

Code (CSharp):

1. [Serializable]
2.     public class LockSystem
3.     {
4.         [Header("Assign If Has A Key")]
5.         public PickableItem keyToOpen;
6.  
7.         [Header("Assign if has password")]
8.         public GameObject password;
9.  
10.         [Header("Is Lock Open?")]
11.         public bool lockOpen = false;
12.     }
13.  
14. public LockSystem lockSystem = new LockSystem();
15.  
16. public void OpenDoor()
17.     {
18.         controls.isOpen = true;
19.         //if used a key and not a lock remove key from inventory
20.         if (CheckForKey() && !GetLockOpen())
21.         {
22.             CLA.inventory[index] = null;
23.             CLA.slotPos[index].gameObject.GetComponent<Image>().sprite = null;
24.         }
25.  
26.         FindObjectOfType<SubtitlesManager>().PlaySubtitles(controls.openSubtitles);
27.  
28.         #region Play sounds
29.         if (gameObject.tag == "Vents")
30.         {
31.             FindObjectOfType<AudioManager>().Play("Vents");
32.  
33.         }
34.         else
35.         {
36.             PlaySFX(doorSounds.open);
37.         }
38.         #endregion
39.  
40.         #region Play animation
41.         if (GetComponent<Animation>() == null)
42.             anim.SetTrigger("OpenDoor");
43.         else if(GetComponent<Animation>() != null)
44.             GetComponent<Animation>().Play();
45.         #endregion
46.  
47.         gameObject.GetComponent<BoxCollider>().enabled = false;
48.     }
49.  
50. bool CheckForPassword()
51.     {
52.         Debug.Log(lockSystem.password.GetComponent<PasswordSystem>().GetUnlocked());
53.         return lockSystem.password.GetComponent<PasswordSystem>().GetUnlocked();
54.     }

and the Password Script:

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.UI;
3.  
4. public class PasswordSystem : MonoBehaviour
5. {
6.  
7.     public Canvas passwordCanvas;
8.     public InputField[] inputFields; //List of all input fields involved
9.  
10.     [Space(10)]
11.     public string yourPassword = "11 22 33";
12.     public string playerPassword = "";
13.  
14.     [Space(10)]
15.     public bool unlocked = false;
16.  
17.     public void CheckPassword()
18.     {
19.         GetPlayerPass();
20.         if (playerPassword == yourPassword)
21.         {
22.             transform.GetComponentInParent<DoorOpen>().OpenDoor();
23.             unlocked = true;
24.         }
25.     }
26.  
27.     public bool GetUnlocked()
28.     {
29.         return unlocked;
30.     }
31.  
32.     void GetPlayerPass()
33.     {
34.         playerPassword = "";
35.         foreach (InputField field in inputFields)
36.         {
37.             playerPassword += field.text + " ";
38.         }
39.     }
40.  
41. }

now when I tryto open the door by pressing E, I check if there is a passwordSystem object applyed in inspector, and there is. But yet it does not work and says the object does not exist
Any help? if somthing is unclear tell me and I will try my best to explain better

 

Since you are dereferencing game objects so many times, it would help if you told you which script was throwing the exception at which line.

-ch

 

the door script at line 52/53 (52 is a debug for 53)

 

Ok so I somehow solved it. I changed the type in line 8 of the door script to PasswordSystem and it somehow worked