OnMouseDrag() not working ...

ive created this cheat sheets I use for draggables in all my projects. One for gameobjects and another for UI. Please follow the instructions. It is recommended you try the script in a new scene to make sure the setup is correct before making changes to your current.

Edit: I realized how horrible this looks on here but go ahead and copy and paste it into Unity and follow along from there. (:

 using UnityEngine;
 using UnityEngine.EventSystems;
 
 /*
     Instructions:
         1. Create one of the following:  
             a. Cube (this will have a box collider which we'll need for game objects)
             b. Sprite (this will not need a collider, we'll use a different peice of code for UI stuff)
         2. Attach this script onto our objects from above
         3. Go to your Main Camera Game Object in the scene and add a Physics 2D Raycaster
         4. In the "Hierarchy" panel, click "Create", select "UI", and create a new "Canvas".
             Note: This will create a Canvas AND EventSystem (we want both because the Event system also has a Stand Alone Input Module.)
         4. Edit the code depending if you are using a GameObject OR UI object
         5. Now youre done! Click and drag the cube (:
 
     You can add more Interface handelers such as IBeginDragHandler, IEndDragHandler, IPointerDownHandler, IPointerUpHandler, IPointerEnterHandler, IPointerExitHandler and more
 */
 
 public class TestDrag : MonoBehaviour, IDragHandler
 {
 
     public void OnDrag(PointerEventData eventData)
     {
         // Pick one peice of code depending on Step 1 in the instructions and comment out the other. In this example we are using a cube so I commented out the sprite example
 
         // For Game Objects: Use below to use this script for Game Objects like our cube because we convert where our mouse points to world coordinates with ScreenPointToRay()
         Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
         transform.position = (new Vector3(ray.origin.x, ray.origin.y, 0));
 
         // For UI Sprites: Uncomment below to use this script for UI objects like sprites, raw images, etc because we use the actual mouse input without converstion needed
         //transform.position = new Vector3(Input.mousePosition.x, Input.mousePosition.y, 0);
             // Warning: Adding a Canvas to the sprite object will make the object unmoveable.
     }
 
 }