This is the PingClan v1.2 bugfix. Please replace the code in your /views/default/assets/js/custom.js file with this code.

custom.js

$(function() {

  var html = $('html, body'),
      results = $('results'),
      domainPing = $('#domain-ping');

  $('#search').on('submit', function() {

    // Scroll to result area on form submit
    html.delay(1100).animate({
        scrollTop: $('#search').offset().top
    }, 800, 'easeInOutExpo');

        // Remove the old result on next run
        $('#results').empty();

        // Get the url 
        var url = $('#url').val().toLowerCase();
        url = url.replace('https://', '').replace('http://', '').replace('www.', '').replace('/', '');
        newUrl = url.substr(0, 1).toUpperCase() + url.substr(1);

        // Show a notification 
        domainPing.text(lang['pinging'] + " " + newUrl);
        $('#loader').show("slide", { direction: "right" }, 1000);

        // do the intial ping
        $.get('process.php?init=true', function(siteNum) {

          console.log('first hit');
          
              // show a error if no urls are found
              if(siteNum.available < 1) {
                error = $('<div class="alert alert-error">' + newUrl + " " + lang["status_error"] + '</div>').hide();
                error.appendTo('#results').show("slide", { direction: "right" }, 1000);
                return;
              }

              handles = [];

              count = 0;
              // process all pings
              for(i = 1; i <= siteNum.available; i++) {

                handle = $.get('process.php', {
                            'domain' : url,
                            'hit_on' : i
                          }, function(data) {

                              if(data.site != "<strong>ERROR: </strong>")
                              {

                                className = 'alert alert-';
                                if(data.status_msg === 'success') 
                                {
                                  className += 'primary';
                                  count = count + 1;
                                } 
                                else if(data.status_msg === 'error') 
                                {
                                  className += 'error';
                                }
                              
                                template = $('<div class="' + className + '">' + data.site + '</div>').hide();
                                template.appendTo('#results').show("slide", { direction: "right" }, 1000);
                              }
                          }, "json");

                handles.push(handle);
              }

              // Show number of backlinks processed
              $.when.apply($, handles).then(function(){
                $("#animator, #domain-ping").hide();
                domainPing.text( count + lang['after_ping'] + newUrl);
                domainPing.show("slide", { direction: "right" }, 1000);
              });

        }, "json");

  });

  
  // Back to top
  $('.backtotop').click(function(){
      html.animate({scrollTop:0}, 'slow');
  });
});