@codemovement.pk: The site is in a dev area currently and not publicly accessible as yet.
@vee: I believe that is loaded, yes. I can see the following two lines showing in the footer of the displayed HTML output:
<script type='text/javascript' src='https://example.com/wp-content/themes/bootstrap-basic/js/vendor/bootstrap.min.js?ver=3.3.6'></script>
<script type='text/javascript' src='https://example.com/wp-content/themes/bootstrap-basic/js/main.js?ver=4.5.2'></script>