i am getting the iframe refused error in below code

>
<html lang="en">
<head>
<title>Bootstrap Exampletitle>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js">script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js">script>
<script>
$(document).ready(function(){
let height = $(window).height();
$('#MainFrame').height(height - 20);
setInterval(function(){
var iframe = document.getElementById('MainFrame');
iframeiframe.src = iframe.src;
console.log('restored');
},10000);
});
script>
head>
<body>
<div class="container">
<iframe id="MainFrame" width="100%" src="https://www.google.in/">
iframe>
div>
body>
html>