Hello There,
Please have the custom JS code in the theme options custom JS section updated and use this:
jQuery(function($) {
    $('.scrol-top-advanced a').on('click', function(event) {
        event.preventDefault();
        setTimeout(function() {
            $('.scrol-top-advanced a').css('display', 'none');
        }, 1000);
    });
});
jQuery('.cp-default-close').on('click', function() {
    jQuery('video')[0].pause();
});
jQuery('.wp-side-menu a.wp-side-menu-item').attr('target', '_blank');
jQuery(function($) {
    $(document).on('click', '.cp-overlay-close', function() {
        $('.rev_slider video').each(function() {
            $(this).get(0).pause();
        });
    });
});
(function($){
  $(document).scroll(function() {
    var y = $(this).scrollTop();
    if (y > 665) {
      $('.wp-side-menu').fadeIn();
    } else {
      $('.wp-side-menu').fadeOut();
    }
  });
})(jQuery);
//=================================== SMOOTH SCROLLING EXTERNAL ANCHOR //      
(function($){
  $(document).on("ready", function () {
      var urlHash = window.location.href.split("#")[1];
      $('html,body').animate({
          scrollTop: $('.' + urlHash + ', #' + urlHash +',[name='+urlHash+']').first().offset().top -100
      }, 1000);
  });
 
})(jQuery);
 
 
// =================================== SMOOTH SCROLLING LOCAL ANCHOR //
(function($) {
        $('a[href*=#]:not([href=#])').click(function() {
            if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'') && location.hostname == this.hostname) {
              var target = $(this.hash);
              target = target.length ? target : $('[name=' + this.hash.slice(1) +']');
              if (target.length) {
                $('html,body').animate({
                  scrollTop: target.offset().top -100
                }, 1000);
                return false;
              }
            }
        });
})(jQuery);
// =================================== SMOOTH SCROLLING LOCAL ANCHOR 
(function($){
  $(document).ready(function() { 
      var elem = $('#_' + window.location.hash.replace('#', ''));
      if(elem) {
           $.scrollTo(elem.left, elem.top);
      }
  });
})(jQuery);
We need to eliminate the JS error on the page first. Please let us know how it goes.