Camera becomes wonky after crossing the Y-Axis

Hey guys, I'm working through a 3dBuzz tutorial on 2D platformers (I'm an college student trying to pick up Unity and C#) and I encountered a problem working on the Camera Controller.

The camera tracks just fine however when the MainCamera object crosses the Y-Axis the entire Game view just reverts to the blue default background

I tried shifting the entire scene to the left side of the Y-Axis but then the camera just showed everything as blue.

example

the code for my Camera Controller is below

 using UnityEngine;
 using System.Collections;
 
 public class CameraController : MonoBehaviour
     {
     public Transform Player;
 
     public Vector2 Margin;
     public Vector2 Smoothing;
 
     public BoxCollider2D Bounds;
 
     private Vector3 
         _min,
         _max;
 
     public bool IsFollowing { get; set; }
 
     public void Start()
     {
         _min =  Bounds.bounds.min;
         _max =  Bounds.bounds.max;
         IsFollowing = true;
 
     }
 
     public void Update() 
     {
         var x = transform.position.x;
         var y = transform.position.y; 
 
         if (IsFollowing)
         {
             if(Mathf.Abs(x - Player.position.x) > Margin.x)
                 x = Mathf.Lerp(x, Player.position.x, Smoothing.x * Time.deltaTime);
 
             if(Mathf.Abs(y - Player.position.y) > Margin.y)
                 y = Mathf.Lerp(y, Player.position.y, Smoothing.y * Time.deltaTime);
         }
 
         var cameraHalfWidth = Camera.main.orthographicSize * ((float) Screen.width / Screen.height);
         x = Mathf.Clamp(x, _min.x + cameraHalfWidth, _max.x - cameraHalfWidth);
         y = Mathf.Clamp(y, _min.y + Camera.main.orthographicSize, _max.y - Camera.main.orthographicSize);
 
         transform.position = new Vector3(x, y, transform.position.x);
     }
 
     
 }