Having trouble linking camera in my script?

Hello, my game objects "formations" are not moving properly... They move to the right and get stuck. I am getting the error

MissingComponentException: There is no 'Camera' attached to the "EnemySpawners" game object, but a script is trying to access it.You probably need to add a Camera to the game object "EnemySpawners". Or your script needs to check if the component is attached before using it.FormationController.Start () (at Assets/Enemies/FormationController.cs:17)

I tried changing camera to Camera, but that did not help I am rather confused on how to link the same camera in different scripts, because right now the camera is attached to my player sprite and follows the ship around in a different script.

Here is my code,

 using UnityEngine;
 using System.Collections;
 
 public class FormationController : MonoBehaviour
 {   //Spawning Variables
     public GameObject EnemyPrefab;
     public float W = 10, H = 5;
     //Movement Variables
     public float Speed = 5;
     private int Direction;
     private float BoundaryRightEdge, BoundaryLeftEdge;
     public float Padding = 0.25f;
 
 
     void Start() //Setting Boundary
     {   Camera camera = GetComponent<Camera>();
         float distance = transform.position.z - camera.transform.position.z;
         BoundaryLeftEdge = camera.ViewportToWorldPoint(new Vector3(0, 0, distance)).x + Padding;
         BoundaryRightEdge = camera.ViewportToWorldPoint(new Vector3(1, 1, distance)).x - Padding;
        
         
         //Spawn at each Enemy Formation Game Object
         foreach (Transform child in transform)
         {
             GameObject enemy = Instantiate(EnemyPrefab, child.transform.position, Quaternion.identity) as GameObject;
             enemy.transform.parent = child;
         }
 
     }
 
     void OnDrawGizmos()
     {
         float xmin, xmax, ymin, ymax;
         xmin = transform.position.x - 0.5f * W;
         xmax = transform.position.x + 0.5f * W;
         ymin = transform.position.y - 0.5f * H;
         ymax = transform.position.y + 0.5f * H;
         Gizmos.DrawLine(new Vector3(xmin, ymin, 0), new Vector3(xmin, ymax, 0));
         Gizmos.DrawLine(new Vector3(xmin, ymax, 0), new Vector3(xmax, ymax, 0));
         Gizmos.DrawLine(new Vector3(xmax, ymax, 0), new Vector3(xmax, ymin, 0));
         Gizmos.DrawLine(new Vector3(xmax, ymin, 0), new Vector3(xmin, ymin, 0));
 
     }
 
     void Update()
     {   float FormationRightEdge = transform.position.x + 0.5f * W;
         float FormationLeftEdge = transform.position.x - 0.5f * W;
         if (FormationRightEdge > BoundaryRightEdge)
         {
             Direction = -1;
         }
         if (FormationLeftEdge < BoundaryLeftEdge){
             Direction = 1;
         }
         transform.position += new Vector3(Direction * Speed * Time.deltaTime, 0, 0);
 
         //Spawn Enemies on Keypress
         if (Input.GetKeyDown(KeyCode.S))
         {
             foreach (Transform child in transform)
             {
                 GameObject enemy = Instantiate(EnemyPrefab, child.transform.position, Quaternion.identity) as GameObject;
                 enemy.transform.parent = child;
             }
         }
     }
 }