The variable obj_Bullet of PlayerShooting has not been assigned. How the problem is solved?

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class PlayerShooting : MonoBehaviour
6. {
7.     public GameObject object_Bullet;
8.     public float time_Bullet_Spawn = 0.3f;
9.     [HideInInspector]
10.     public float timer_Shot;
11.     private void Update()
12.     {
13.         if (Time.time > timer_Shot)
14.         {
15.             timer_Shot = Time.time + time_Bullet_Spawn;
16.             Instantiate(object_Bullet, transform.position, Quaternion.identity);
17.         }
18.     }
19. }
20.  

 

Where did you put this script?

 

Click Player in Hierarchy, and put something in the Object_Bullet slot.