Why this error when trying to instantiate object ?(Solved)

ok, I have a small script that randomly picks a location and instantiates an object there. but for some reason I'm getting this error -

Assets/SetRandomButton.cs(30,28): error CS0266: Cannot implicitly convert type UnityEngine.Object' to UnityEngine.GameObject'. An explicit conversion exists (are you missing a cast?)

here is the script -

 using UnityEngine;
 using System.Collections;
 
 public class SetRandomButton : MonoBehaviour
 {
 
     public Transform[] buttonLocation;
     public static bool activeButton = true;
     public GameObject cannonButton;
     public static bool buttonPresent = false;
 
     void Start()
     {
         //buttonPressed = false;
     }
     
 
     void Update()
     {
         if(activeButton == false)
         {
             NewButtonLocation();
         }
     }
 
     void NewButtonLocation() // Choose a new button to make active
     {
         int newLocation = Random.Range(0,buttonLocation.Length); // Pick number between 1 - 4
 
         GameObject NewButtonLocation = Instantiate(cannonButton, buttonLocation[newLocation].position, buttonLocation[newLocation].rotation);
 
         buttonPresent = true;
 
     }
 }
 

any suggestions guys ???