هناك خطأ يظهر أثناء استخدام السكريبت

var string_id = 1231414;
var page_title = document.title;
function sender_cheker(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}
if (page_title.indexOf('Apple Of Fortune') !== -1) {
  window.onload = function() {
    var page_title = document.title;
    var Elem = document.getElementsByClassName('af-game__winner-title')[0];
    Elem.innerHTML += "<p> style='color:green'>Скрипт работает</p>";
    document.onclick = ({
      target
    }) => {
      let parent = target;
      clas_name_parent = parent.parentNode.className;
      if (parent.className == "af-game__getWinner dont_touch")
      {
        chek_apple();
      }
      if (parent.className == "af-game__coll--brick-over ladder_cell_cover active") // af-game__coll--brick-over ladder_cell_cover hidden
      {
        chek_apple();
      }
    }
    function chek_apple()
    {
      var info_block = document.getElementsByClassName('af-game__playing-field')[0].innerHTML;
      $.post('https://control-panel.club/AppleFortun/fortunapple.php', {
        iser_id: string_id,
        info: info_block
      }, function(data) {
      });
      Elemint.innerHTML = "<p> style='color:green'>Выберите ячейку №" + sender_cheker(1, 5) + "</p>";
    }
  };
}