It looks like this is a jquery/js issue. The add-on.lp.sliderjs is getting an exception.
When I compare the page code of this site
http://www.jmhsband.org/new with the "quick start package" or the template on the Joomshaper site, all of the main bootstrap scripts are loading right at the top of the page - and are not on the "package" load.
<script type="text/javascript" src="/new/media/system/js/mootools-core.js"></script>
<script type="text/javascript" src="/new/media/jui/js/jquery.min.js"></script>
<script type="text/javascript" src="/new/media/jui/js/jquery-noconflict.js"></script>
<script type="text/javascript" src="/new/media/jui/js/bootstrap.min.js"></script>
What would be causing the scripts to load in different places?