I fixed this. There is a typo in regalway/functions.php line 24/25 which is supposed to include mobile-menu.js:
change
wp_enqueue_script('mobile-menu', get_template_directory_uri() . "/js/mobile-menu.js", array(
'jquery','',true));
to
wp_enqueue_script('mobile-menu', get_template_directory_uri() . "/js/mobile-menu.js", array(
'jquery'),'',true);
This typo provided bogus prerequisites for the js file which cannot be satisfied, preventing it from being included.
Regards,