Trouble with OnTriggerEnter and GetComponent

UPDATE

Well I am still lost. I added a few more debug statements:

     void OnTriggerEnter(Collider col)
     {
         playerIsNearDeadMob = true;
         myGuiScript = col.gameObject.GetComponent<myGUI>();
         Debug.Log("You have entered dead corpse");
         if(myGuiScript == null)
         {Debug.Log ("Gui script is null...");}
         else
         {Debug.Log("guiscript is not null");}
     }

Now when I enter the trigger, here is the debug that prints:

You have entered dead corpse GUI Script is null... Guiscript is not null you have exited corpse

So even though I never leave the trigger it seems to think I have left the trigger. Doesnt make any sense. I tried making the trigger bigger to no avail :/

Hello,

I have a script which is on a (dead) mob and uses OnCollisionEnter to detect that the player is near via a sphere collider, and once the player has entered it, it uses GetCompenent to access the a script on the player called myGUI. It then it turn runs a script which opens a loot window for the player to loot items.

The problem I am having is that the sphere collider detects the player, but I am getting a null reference from the GetCompenent. When I try to access the variable myGuiScript, its null.

Would you mind taking a look and seeing if you can find why myGuiScript would be null?

Here are the pertinent parts of the script:

 private myGUI myGuiScript;
 public bool playerIsNearDeadMob = false;
 
 public void OnMouseUp()
     {
         if(myGuiScript == null)
             Debug.Log ("Player is not close enough to the loot");
         
         else if(playerIsNearDeadMob)
         {
             switch(state)
             {
             case State.open:
                 state = MobLoot.State.inBetween;
                 StartCoroutine("Close");
                 break;
             case State.closed:
                 state = MobLoot.State.inBetween;
                 StartCoroutine("Open");
                 break;
             }
         }
         
     }
 
     void OnTriggerEnter(Collider col)
     {
         playerIsNearDeadMob = true;
         myGuiScript = col.transform.GetComponent<myGUI>();
         Debug.Log("You have entered dead corpse");
     }
     
     void OnTriggerExit()
     {
         StartCoroutine("Close");
     }    

OnMouseUp, it tells me I am not near enough to the mob, basically saying that myGuiScript is null, even though per my other debug.log, I AM inside the collider. Then I also get a null reference for one of the myguiscript.whatever in the coroutines.