Input Axis Mouse Scrollwhee,Input Axis Mouse Scrollwheel

`,so I just started following a tutorial and I keep getting the error
ArgumentException: Input Axis Mouse Scrollwheel is not setup.
To change the input settings use: Edit → Settings → Input
MMOCharacterController.Update () (at Assets/MMOCharacterController.cs:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

    public class MMOCharacterController : MonoBehaviour{
     public Transform playerCam, character, centerPoint;
     private float mouseX, mouseY;
     public float mouseSensitivity = 10f;
     private float moveFB, moveLR;
     public float moveSpeed = 2f;
     private float zoom;
     public float zoomSpeed = 2;
    public float zoomMin = -2f;
    public float zoomMax = -10f;
        // Start is called before the first frame update
        void Start() {
        // Update is called once per frame
        void Update() {
            zoom += Input.GetAxis("Mouse Scrollwheel") * zoomSpeed;
            if (zoom > zoomMin)
            zoom = zoomMin;
            if (zoom < zoomMax)
            zoom = zoomMax;
            playerCam.transform.position = new Vector3(0, 0, zoom);
            if (Input.GetMouseButton (1)) {
                mouseX += Input.GetAxis ("Mouse X");
                mouseY += Input.GetAxis ("Mouse Y");


Did you check the Project Settings if there is an Axis named “Mouse Scrollwheel”?