Uncaught TypeError: Object # has no method ‘datepicker’ [closed]

This line shouldn’t be in there:

<script type="text/javascript" src="http://xxxx/wp-includes/js/jquery/ui/jquery-ui.min.js"></script>

In a standard WordPress install, no such file exists. This makes me wonder how you are adding the scripts to the theme in the first place. Are you using wp_enqueue_styles? If not, there is a VERY good chance that you are indeed adding two versions of jQuery.