Loading Xml file issues

Have a script that should load my Xml files but it doesn't seem to be working. This is my first time working with Xml and it probably a simple fix but I'm not sure exactly what the issue is. OnSpeedPress is connected to a button and when pressing that button Title.text is displayed as 0 and 1 is shown in the console, despite how many times I press the button. I also plan on running this on android so if there is an android specific issue I should know about please let me know. I should also mention that an Xml file is being created but I don't think I'm referencing the Speedlvl properly. Here's the save script:

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 using System.Xml;
 using System.Xml.Serialization;
 using System.IO;
 
 public class UpgradeSave : MonoBehaviour
 {
     public static UpgradeSave ins;
     private void Awake()
     {
         ins = this;
     }
 
     public UpgradeDataBase UpgradeDB;
 
     public void Save()
     {
         XmlSerializer serializer = new XmlSerializer(typeof(UpgradeDataBase));
         FileStream stream = new FileStream(Application.dataPath + "/playerData.xml", FileMode.Create);
         serializer.Serialize(stream, UpgradeDB);
         stream.Close();
     }
 
     public void Load()
     {
         XmlSerializer serializer = new XmlSerializer(typeof(UpgradeDataBase));
         FileStream stream = new FileStream(Application.dataPath + "/playerData.xml", FileMode.Open);
         UpgradeDB = serializer.Deserialize(stream) as UpgradeDataBase;
         stream.Close();
     }
 }
 
 [System.Serializable]
 public class UpgradeEntry
 {
     public int Manalvl;
     public int Speedlvl; 
     public int Healthlvl;
     public int Defenderlvl;
     public int Bal;
 }
 
 [System.Serializable]
 public class UpgradeDataBase
 {
     [XmlArray("UpgradeLevels")]
     public List<UpgradeEntry> list = new List<UpgradeEntry>();
 }

The script for the button

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 
 public class UpgradeFunctions : MonoBehaviour
 {
     public Text Title;
     public Text Description;
     public Text Balance;
     public Text PurchaseSuccesful;
 
     public int price;
 
     public Button Purchase;
     public Text PurchaseTxt;
 
     public void OnSpeedPress()
     {
         UpgradeEntry upgradeEntry = new UpgradeEntry();
         Title.text = "" + upgradeEntry.Speedlvl;
         upgradeEntry.Speedlvl++;
         Debug.Log("" + upgradeEntry.Speedlvl);
         UpgradeSave.ins.Save();
     }
 }