https://themepro.com/builder/js/loader.min.js?1.1.7
Themepro is down, this is needed for Pagebuilder?
<!DOCTYPE html>
<html>
<head>
<title>Edit Page</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0">
<!-- jQuery, using core -->
</head>
<body class="jub jub-loading">
<div id="jub-mainbody">
</div>
<!-- <script src="/media/jui/js/jquery.min.js"></script> -->
<!-- <script src="/media/jub/assets/lib/bootstrap/js/bootstrap.min.js"></script> -->
<script>
JUB = {
provider: 'joomlart',
siteUrl: '',
mediaUrl: '/media/jub/dev/default',
assetUrl: '/media/jub/assets',
ckeditorUrl: '/plugins/system/jabuilder/assets/ckeditor',
siteUrlHelper: location.href,
toolUrl: 'https://themepro.com/builder',
site: 'jba4331fbc2745-e39fbf7a041d5',
osite: '',
page: '2d7d7823f2afd',
layout: '7b7b7c1cd01bc',
page_new: '1',
container: '#jub-mainbody',
contents: {
header: 'blocks',
content: 'blocks',
footer: 'blocks'
},
encodeData: 1,
version: '1.1.7',
upload_max_size: 1 }
// jQuery.getScript(JUB.toolUrl + '/js/main.js');
</script>
<script src="https://themepro.com/builder/js/loader.min.js?1.1.7"></script>
</body>
</html>