Hi, can someone help with this error. I'm new and trying to create a new VF page so that i can use this in Lighting view

</apex:page><apex:page showHeader="true" tabStyle="Remedyforce_Self_Service__tab" 
    sidebar="false" controller="BMCServiceDesk.SelfServiceSettingsController" 
    title="{!JSENCODE($Label.bmcservicedesk__remedyforce_self_service)}" action="{!redirectSelfServiceVersion}">
<apex:form id="StdSelfServiceHomeId" style="{!IF(isNewSSUI,'height:850px','height:730px')}">
   <apex:iframe id="myFrameOld" frameborder="0" src="{!URLFOR($Site.Prefix+''+$Page.BMCServiceDesk__SSLandingPage,null,['standardLayout'=true])}" height="100%" width="100%" rendered="{!isNewSSUI}"/>
   <apex:iframe id="myFrameNew" frameborder="0" src="{!URLFOR($Site.Prefix+''+$Page.BMCServiceDesk__SelfServiceHome,null,['standardLayout'=true])}" height="100%" width="100%" rendered="{! NOT(isNewSSUI)}"/>
</apex:form>   
 <script> 
var StdSelfServiceHomeId='{!$Component.StdSelfServiceHomeId}';
var width = window.innerWidth || document.documentElement.clientWidth;
document.getElementById("myFrameOld").width = width - 50;
 var enableWalkthroughFlow = '{!enableWalkthroughFlow }';
var userLanguage = '{!userLanguage}';
</script> 
 <script type="text/javascript" src="{!$Resource.SDEFCommonJS}/WhatFixScript.js"></script> 
</apex:page>