Help with my Save and load script please!

So i made this script to load and save i am jsut testing and plan to add more variables later however when i created the script i got a error

Here is my Click Script which has the gold float inside

 using System.Collections;
 using UnityEngine;
 
 public class Click : MonoBehaviour {
 
     public UnityEngine.UI.Text GPC;
     public UnityEngine.UI.Text goldDisplay;
     public float gold = 0.00f;
     public int goldperclick = 1;
 
     void Update () {
         goldDisplay.text = "Gold : " + Currency.Instance.GetCurrencyIntoString(gold, false, false);
         GPC.text = "GPC: " + goldperclick;
     }
 
     public void Clicked(){
         gold = gold + goldperclick;
     }
 
 }