Unity playerprefs | formatexception: input string was not in a correct format

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C#

Unity

Unity3D

Unity2D

I started using PlayerPrefs in Unity and everything worked perfectly. Then I tried to build the game to send it to a friend. *But* as I tested it one more time (build version). The PlayerPrefs stopped working. It's just, like they never existed. Saving between Scenes does not work. Back in the Unity Editor, everything works. But why?

Hope somebody can help me, so I can play my game outside the editor 💀.

Kind regards.

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Ok, restarted unity, and now I am getting an error, the game in and outside Unity malfunctions now the same. But why (and why tf did it work like a charm before I restarted and Unity recognized the error)? Please help.

FormatException: Input string was not in a correct format.
System.Number.StringToNumber (System.String str, System.Globalization.NumberStyles options, System.Number+NumberBuffer& number, System.Globalization.NumberFormatInfo info, System.Boolean parseDecimal) (at <695d1cc93cca45069c528c15c9fdd749>:0)
System.Number.ParseInt32 (System.String s, System.Globalization.NumberStyles style, System.Globalization.NumberFormatInfo info) (at <695d1cc93cca45069c528c15c9fdd749>:0)
System.Int32.Parse (System.String s) (at <695d1cc93cca45069c528c15c9fdd749>:0)
UI_Inventory.RefreshInventoryItemsNewWorld () (at Assets/SinglePlayer/Scripts/Inventory/UI_Inventory.cs:123)
UI_Inventory.Start () (at Assets/SinglePlayer/Scripts/Inventory/UI_Inventory.cs:24)

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Here is the script I save in:

using System.Collections;
        using System.Collections.Generic;
        using UnityEngine;
        using UnityEngine.UI;
        using CodeMonkey.Utils;
        using TMPro;
        
        public class UI_Inventory : MonoBehaviour
        {
            private Inventory inventory;
            private Transform itemSlotContainer;
            private Transform itemSlotTemplate;
            private PlayerController player;
        
            private void Awake() {
                itemSlotContainer = transform.Find("itemSlotContainer");
                itemSlotTemplate = itemSlotContainer.Find("itemSlotTemplate");
            }
        
            private void Start()
            {
                RefreshInventoryItemsNewWorld();
            }
        
            public void SetPlayer(PlayerController player)
            {
                this.player = player;
            }
        
            public void SetInventory(Inventory inventory) 
            {
                this.inventory = inventory;
        
                inventory.OnItemListChanged += Inventory_OnItemListChanged;
        
                RefreshInventoryItems();
            }
        
            private void Inventory_OnItemListChanged(object sender, System.EventArgs e)
            {
                RefreshInventoryItems();
            }
        
            private void RefreshInventoryItems()
            {
                foreach (Transform child in itemSlotContainer)
                {
                    if (child == itemSlotTemplate) continue;
                    Destroy(child.gameObject);
                }
        
                int x = 0;
                int y = 0;
                float itemSlotCellSize = 90f;
        
                foreach (Item item in inventory.GetItemList())
                {
        
                    RectTransform itemSlotRectTransform = Instantiate(itemSlotTemplate, itemSlotContainer).GetComponent<RectTransform>();
                    itemSlotRectTransform.gameObject.SetActive(true);
        
                    itemSlotRectTransform.GetComponent<Button_UI>().ClickFunc = () => 
                    {
                        inventory.UseItem(item);
                    };
        
                    itemSlotRectTransform.GetComponent<Button_UI>().MouseRightClickFunc = () => 
                    {
                        Item duplicateItem = new Item { itemType = item.itemType, amount = item.amount };
                        inventory.RemoveItem(item);
                        ItemWorld.DropItem(player.GetPosition(), duplicateItem);
                    };
        
                    itemSlotRectTransform.anchoredPosition = new Vector2(x * itemSlotCellSize, y * itemSlotCellSize);
                    Image image = itemSlotRectTransform.Find("image").GetComponent<Image>();
                    image.sprite = item.GetSprite();
        
                    TextMeshProUGUI uiText = itemSlotRectTransform.Find("text").GetComponent<TextMeshProUGUI>();
                    if (item.amount > 1)
                    {
                        uiText.SetText(item.amount.ToString());
        
                        // sets player pref
                        PlayerPrefs.SetString(item.itemType.ToString(), item.amount.ToString());
        
                        PlayerPrefs.Save();
                    } else {
                        uiText.SetText("");
                    }
        
                    x++;
                    if (x > 4) {
                        x = 0;
                        y++;
                    }
        
                }
                
            }
        
            private void RefreshInventoryItemsNewWorld()
            {
                foreach (Transform child in itemSlotContainer)
                {
                    if (child == itemSlotTemplate) continue;
                    Destroy(child.gameObject);
                }
        
                int x = 0;
                int y = 0;
                float itemSlotCellSize = 90f;
        
                foreach (Item item in inventory.GetItemList())
                {
                    item.amount = int.Parse(PlayerPrefs.GetString(item.itemType.ToString()));
        
                    RectTransform itemSlotRectTransform = Instantiate(itemSlotTemplate, itemSlotContainer).GetComponent<RectTransform>();
                    itemSlotRectTransform.gameObject.SetActive(true);
        
                    itemSlotRectTransform.GetComponent<Button_UI>().ClickFunc = () => 
                    {
                        inventory.UseItem(item);
                    };
        
                    itemSlotRectTransform.GetComponent<Button_UI>().MouseRightClickFunc = () => 
                    {
                        Item duplicateItem = new Item { itemType = item.itemType, amount = item.amount };
                        inventory.RemoveItem(item);
                        ItemWorld.DropItem(player.GetPosition(), duplicateItem);
                    };
        
                    itemSlotRectTransform.anchoredPosition = new Vector2(x * itemSlotCellSize, y * itemSlotCellSize);
                    Image image = itemSlotRectTransform.Find("image").GetComponent<Image>();
                    image.sprite = item.GetSprite();
        
                    TextMeshProUGUI uiText = itemSlotRectTransform.Find("text").GetComponent<TextMeshProUGUI>();
                    if (item.amount > 1)
                    {
                        uiText.SetText(item.amount.ToString());
        
                        // sets player pref
                        PlayerPrefs.SetString(item.itemType.ToString(), item.amount.ToString());
        
                        PlayerPrefs.Save();
        
                    } else {
                        uiText.SetText("");
                    }
        
                    x++;
                    if (x > 4) {
                        x = 0;
                        y++;
                    } 
                }
            }
        }

What I have tried:

I have tried to restart unity and went through all different types of PlayerPref methods. I am kind of new to Unity, so please excuse beginner errors 😅.