my json saves but doesnt load after i exit my game

to test out my json save function i built my game i clicked my savegame button and it saved my data when i clicked my load button it changed my players coordinates to the coordinates of the player when i saved my game. However when i exited my game and tried to load it didnt save the map or my position heres my saving script: using System; using UnityEngine; using System.IO; public class savemanager : MonoBehaviour { public string worldfile; public GameObject worldmap; public string json; public string fromjson; public int recoveredint; public savedata copy; public maploader mapreference; public void Start() { loadgame(); } public void savegame() {

     savedata data = new savedata { map = worldmap, mapalreadygenerated = true, playerz = GameObject.FindWithTag("Player").transform.position.z, playerx = GameObject.FindWithTag("Player").transform.position.x };
     worldfile = Path.Combine(Application.persistentDataPath, data.map.name);
     json = JsonUtility.ToJson(data);
     if (File.Exists(worldfile))
     {
         File.Delete(worldfile);
     }
     File.WriteAllText(worldfile, json);
     Debug.Log("data saved to" + worldfile);
     fromjson = File.ReadAllText(worldfile);
     copy = JsonUtility.FromJson<savedata>(fromjson);


 }
 public void loadgame()
 {   
     fromjson = File.ReadAllText(worldfile);
     copy = JsonUtility.FromJson<savedata>(fromjson);
     mapreference.savedworld = copy.map;
     GameObject.FindWithTag("Player").transform.position = new Vector3(copy.playerx, 0, copy.playerz);
 }
     

}

and heres the script of the data i want to save:

using System; using UnityEngine;

[Serializable] public class savedata {

 public GameObject map;
 public int[] slotitems;
 public float[] slotamounts;
 public float playerx;
 public float playerz;
 public bool mapalreadygenerated;

}