Не работает скрипт C#: error CS0246

 using System.Collections; 
using System.Collections.Generic; 
using UnityEngine; 
using UnityEngine.UI; 
 
// Убедитесь, что пространство имен указано правильно, если необходимо 
// using MyGame.Items; 
 
public class PickUpController : MonoBehaviour 
{ 
    public ProjectileItem itemScript; // Убедитесь, что ProjectileItem существует и определен 
    public Rigidbody rb; 
    public BoxCollider coll; 
    public Transform player, itemContainer, fpsCam; 
 
    public float pickUpRange; 
    public float dropForwardForce, dropUpwardForce; 
 
    public bool equipped; 
    public static bool slotFull; 
 
    private void Start() 
    { 
        // Setup 
        if (!equipped) 
        { 
            itemScript.enabled = false; 
            rb.isKinematic = false; 
            coll.isTrigger = false; 
        } 
        else 
        { 
            itemScript.enabled = true; 
            rb.isKinematic = true; 
            coll.isTrigger = true; 
            slotFull = true; 
        } 
    } 
 
    private void Update() 
    { 
        // Check if player is in range and "E" is pressed 
        Vector3 distanceToPlayer = player.position - transform.position; 
        if (!equipped && distanceToPlayer.magnitude <= pickUpRange && Input.GetKey(KeyCode.E) && !slotFull) PickUp(); 
 
        // Drop if equipped and "Q" is pressed 
        if (equipped && Input.GetKeyDown(KeyCode.Q)) Drop(); 
    } 
 
    private void PickUp() 
    { 
        equipped = true; 
        slotFull = true; 
 
        // Make weapon a child of the camera and move it to default position 
        transform.SetParent(itemContainer); 
        transform.localPosition = Vector3.zero; 
        transform.localRotation = Quaternion.Euler(Vector3.zero); 
        transform.localScale = Vector3.one; 
 
        // Make Rigidbody kinematic and BoxCollider a trigger 
        rb.isKinematic = true; 
        coll.isTrigger = true; 
 
        // Enable script 
        itemScript.enabled = true; 
    } 
 
    private void Drop() 
    { 
        equipped = false; 
        slotFull = false; 
 
        // Set parent to null 
        transform.SetParent(null); 
 
        // Make Rigidbody not kinematic and BoxCollider normal 
        rb.isKinematic = false; 
        coll.isTrigger = false; 
 
        // Gun carries momentum of player 
        rb.velocity = player.GetComponent<Rigidbody>().velocity; 
 
        // AddForce 
        rb.AddForce(fpsCam.forward * dropForwardForce, ForceMode.Impulse); 
        rb.AddForce(fpsCam.up * dropUpwardForce, ForceMode.Impulse); 
        // Add random rotation 
        float random = Random.Range(-1f, 1f); 
        rb.AddTorque(new Vector3(random, random, random) * 10); 
 
        // Disable script 
        itemScript.enabled = false; 
    } 
}