@dsds
Try This.
In your ‘Header Extra Content’ attribute replace the code with this.
<link href="/concrete/css/cms.css" rel="stylesheet" type="text/css" media="all">
<script type="text/javascript" src="/concrete/js/cms.js"></script>
<script type="text/javascript" src="/ccm/assets/localization/core/js"></script>
<script type="text/javascript" src="/ccm/assets/localization/jquery/ui/js"></script>