As far as I can see, the module is loaded (it is the last one in my source page)
<script type='text/javascript' src='http://127.0.0.1/wordpress/wp-includes/js/jquery/ui/core.min.js?ver=1.11.4'></script>
<script type='text/javascript' src='http://127.0.0.1/wordpress/wp-includes/js/jquery/ui/datepicker.min.js?ver=1.11.4'></script>
<script type='text/javascript' src='http://127.0.0.1/wordpress/wp-content/plugins/wc-fields-factory/assets/js/jquery-ui-i18n.min.js?ver=4.9.5'></script>
<script type='text/javascript' src='http://127.0.0.1/wordpress/wp-content/plugins/wc-fields-factory/assets/js/jquery-ui-timepicker-addon.min.js?ver=4.9.5'></script>
<script type='text/javascript' src='http://127.0.0.1/wordpress/wp-content/plugins/wc-fields-factory/assets/js/spectrum.js?ver=4.9.5'></script>
<script type='text/javascript' src='http://127.0.0.1/wordpress/wp-content/plugins/wc-fields-factory/assets/js/wcff-client.js?ver=4.9.5'></script>
</body>
