XML Decentralization not working in Unity iOS build which working in Windows

I am getting details for setting up UI and message through XML placed in a custom folder of the build. Its working fine in Windows build, not in iOS. I am attaching the Script used.

XML Operation

 using System.IO;
 using System.Xml.Serialization;
 using UnityEngine;
 using System.Xml;
 
 public class XMLOperations
 {
     public static void Serialize(object item, string path)
     {
         XmlSerializer serializer = new XmlSerializer(item.GetType());
         StreamWriter writer = new StreamWriter(path);
         serializer.Serialize(writer.BaseStream, item);
         writer.Close();
     }
 
     public static T Deserialize<T>(string path)
     {
         XmlSerializer serializer = new XmlSerializer(typeof(T));
         StreamReader reader = new StreamReader(path);
         T deserialized = (T)serializer.Deserialize(reader.BaseStream);
         reader.Close();
         Debug.Log(deserialized);
         return deserialized;
     }
 }

Extract details of XML

 using System.Xml.Serialization;
 using System.IO;
 using System.Text;
 
 [XmlRoot("WelcomePage")]
 public class WelcomePage
 {
     [XmlElement("Background")]
     public GenericDetails background;
     [XmlElement("MotionBand")]
     public GenericDetails motionBand;
     [XmlElement("DefaultLogo")]
     public GenericDetails defaultLogo;
     [XmlElement("WelcomeMessage")]
     public GenericDetails welcomeMessage;
     [XmlElement("VisitName")]
     public GenericDetails visitName;
     [XmlElement("VisitorName")]
     public GenericDetails[] visitorName;
     [XmlElement("Date")]
     public GenericDetails date;
     [XmlElement("Location")]
     public GenericDetails location;
     [XmlElement("CustomerLogo")]
     public GenericDetails customerLogo;
 }
 
 public class GenericDetails
 {
     [XmlElement("ImagePath")]
     public string path;
     [XmlElement("Rect")]
     public string rect;
     [XmlElement("BGColor")]
     public string bgColor;
     [XmlElement("TextAlignment")]
     public string alignment;
     [XmlElement("TextColor")]
     public string textColor;
     [XmlElement("BGTransparency")]
     public float bgTransparency;
     [XmlElement("MaxFontSize")]
     public int maxFontSize;
 }
 
 public class WelcomePageSetup
 {
     public WelcomePageSetup(string url)
     {
         if (!File.Exists(url))
         {
             if (!Directory.Exists(Path.GetDirectoryName(url)))
                 Directory.CreateDirectory(Path.GetDirectoryName(url));
 
             File.WriteAllText(url, WelcomeLayout._main.welcomePageDetails, Encoding.UTF8);
         }
     }
 }

XML File with details

 <?xml version="1.0" encoding="utf-8"?>
 <WelcomePage>
 
   <Background>
     <Rect>1232,0,688,1080</Rect>
     <BGColor>#000000</BGColor>
     <BGTransparency>0.7</BGTransparency>
   </Background>
 
   <MotionBand>
     <ImagePath>/UI/Images/MotionBand.png</ImagePath>
     <Rect>1842,0,78,1080</Rect>
   </MotionBand>
 
   <DefaultLogo>
     <ImagePath>/UI/Images/DefaultLogo.png</ImagePath>
     <Rect>1497,23,320,60</Rect>
   </DefaultLogo>
   
   <WelcomeMessage>
     <Rect>1272,942,557,126</Rect>
     <TextAlignment>mc</TextAlignment>
     <TextColor>#F0AB00</TextColor>
     <MaxFontSize>55</MaxFontSize>
   </WelcomeMessage>
      
   <VisitName>
     <Rect>1272,810,557,123</Rect>
     <TextAlignment>ml</TextAlignment>
     <TextColor>#ffffff</TextColor>
     <MaxFontSize>35</MaxFontSize>
   </VisitName>
 
   <!--Visitor name - we can have 5 visitor name display at a time-->
   <!--Visitor name 1-->
   <VisitorName>
     <Rect>1272,715,557,65</Rect>
     <TextAlignment>ml</TextAlignment>
     <TextColor>#ffffff</TextColor>
     <MaxFontSize>35</MaxFontSize>
   </VisitorName>
 
   <!--Visitor name 2-->
   <VisitorName>
     <Rect>1272,635,557,65</Rect>
     <TextAlignment>ml</TextAlignment>
     <TextColor>#ffffff</TextColor>
     <MaxFontSize>35</MaxFontSize>
   </VisitorName>
 
   <!--Visitor name 3-->
   <VisitorName>
     <Rect>1272,555,557,65</Rect>
     <TextAlignment>ml</TextAlignment>
     <TextColor>#ffffff</TextColor>
     <MaxFontSize>35</MaxFontSize>
   </VisitorName>
 
   <!--Visitor name 4-->
   <VisitorName>
     <Rect>1272,475,557,65</Rect>
     <TextAlignment>ml</TextAlignment>
     <TextColor>#ffffff</TextColor>
     <MaxFontSize>35</MaxFontSize>
   </VisitorName>
 
   <!--Visitor name 5-->
   <VisitorName>
     <Rect>1272,395,557,65</Rect>
     <TextAlignment>ml</TextAlignment>
     <TextColor>#ffffff</TextColor>
     <MaxFontSize>35</MaxFontSize>
   </VisitorName>
 
   <Date>
     <Rect>1272,190,557,48</Rect>
     <TextAlignment>ml</TextAlignment>
     <TextColor>#ffffff</TextColor>
     <MaxFontSize>30</MaxFontSize>
   </Date>
   
   <Location>
     <Rect>1272,140,557,48</Rect>
     <TextAlignment>ml</TextAlignment>
     <TextColor>#F0AB00</TextColor>
     <MaxFontSize>30</MaxFontSize>
   </Location>
 
   <CustomerLogo>
     <Rect>1272,274,140,70</Rect>
   </CustomerLogo>
  
 </WelcomePage>

Calling it through script and path

 using UnityEngine;
 using UnityEngine.UI;
 using System.IO;
 using System.Collections.Generic;
 using System;
 using System.Collections;
 
 public class WelcomeLayout : MonoBehaviour
 {
     public static WelcomeLayout _main;
     public WelcomePage welcomePage;
 
     public RectTransform background;
     public RectTransform motionBand;
     public RectTransform defaultLogo;
     public RectTransform welcomeMessage;
     public RectTransform visitName;
     public RectTransform date;
     public RectTransform location;
     public RectTransform[] visitorName;
     public RectTransform customerLogo;
     
     public Image backgroundBG;
     public Image motionBandImg;
     public Image defaultLogoImg;
     public Image customerLogoImg;
 
     public Text welcomeMessageTxt;
     public Text visitNameTxt;
     public Text dateTxt;
     public Text locationTxt;
     public Text[] visitorNameTxt;
  
     public GameObject[] visitorNameGObj;
 
     string path_base;
     string filePath;
 
     public GameObject welcomeScreenSet;
 
     public bool welcomeScreenDisplayTimer;
     public float welcomeTimer;
     public bool checkOnce;
 
     public bool displayVisiorNameNewSet;
     public float displayVisitorTimer;
     public float displayDuration;
     int displayFrom;
 
     public string currentTime;
     public string currentDay;
 
     public string currentTestTime;
 
     WelcomePageSetup welcomePageSetup;
     
     private void Awake()
     {
         _main = this;
     }
 
     private void Start()
     {
         path_base = Application.dataPath + "/Resources";
 
         path_base = Application.persistentDataPath+ "/Resources";
 #endif
 
         filePath = path_base + "/WelcomeScreenTemplate.xml";
 
         FileInfo file = new FileInfo(filePath);
 
         if (file.Exists)
         {
             Debug.Log("welcome xml available");
         }
         else
         {
             Debug.Log("welcome xml not available - create xml file");
             welcomePageSetup = new WelcomePageSetup(filePath);
         }
 
         if (file.Exists)
         {
             welcomePage = XMLOperations.Deserialize<WelcomePage>(filePath);
         }
     }
 
     //Setup welcome page using XML details
     public void SetWelcomeLayout(string visit, string loc, string day, string welcome, List<string> visitor, string logo)
     {
         //Set BG
         SetRectTransform(welcomePage.background.rect, background);
         SetColor(backgroundBG, welcomePage.background.bgColor, welcomePage.background.bgTransparency);
 
         //Set motion band
         SetSpriteOnImage(motionBandImg, path_base + welcomePage.motionBand.path);
         SetRectTransform(welcomePage.motionBand.rect, motionBand);
 
         //Set default logo
         SetSpriteOnImage(defaultLogoImg, path_base + welcomePage.defaultLogo.path);
         SetRectTransform(welcomePage.defaultLogo.rect, defaultLogo);
 
         //Set Welcome message
         welcomeMessageTxt.text = welcome;
         SetRectTransform(welcomePage.welcomeMessage.rect, welcomeMessage);
         SetColor(welcomeMessageTxt, welcomePage.welcomeMessage.textColor);
         AlignTextAndMaxFont(welcomeMessageTxt, welcomePage.welcomeMessage.alignment, welcomePage.welcomeMessage.maxFontSize);
 
         //Set visit name
         //byte[] bytes = Encoding.Default.GetBytes(visit);
         //visit = Encoding.UTF8.GetString(bytes);
         visitNameTxt.text = visit.ToUpper();
         SetRectTransform(welcomePage.visitName.rect, visitName);
         SetColor(visitNameTxt, welcomePage.visitName.textColor);
         AlignTextAndMaxFont(visitNameTxt, welcomePage.visitName.alignment, welcomePage.visitName.maxFontSize);
 
         //Set date
         //dateTxt.text = day;
         currentDay = day;
         SetRectTransform(welcomePage.date.rect, date);
         SetColor(dateTxt, welcomePage.date.textColor);
         AlignTextAndMaxFont(dateTxt, welcomePage.date.alignment, welcomePage.date.maxFontSize);
 
         //Set location
         locationTxt.text = loc;
         SetRectTransform(welcomePage.location.rect, location);
         SetColor(locationTxt, welcomePage.location.textColor);
         AlignTextAndMaxFont(locationTxt, welcomePage.location.alignment, welcomePage.location.maxFontSize);
 }

}

Please do check the script and help me out to resolve the issue. Its working fine in standalone builds, I can edit the XML details, its reflecting the UI. In iOS build its not de-serializing, the function with XML details got error because of details not de-serializing and retrieved.