For some reason, in the cart in Bitrix it does not go to the checkout page, what's the problem?

Question

1C-Bitrix

For some reason, in the cart in Bitrix, it does not go to the checkout page. It just redirects to the main page. Where to dig, tell pzh?
Is this a JS issue? It’s just that they commented somewhere before me so that the basket does not function, but I don’t understand where to look.



Here is the code:

<?if (!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();

$arUrls = Array(
  "delete" => $APPLICATION->GetCurPage()."?".$arParams["ACTION_VARIABLE"]."=delete&id=#ID#",
  "delay" => $APPLICATION->GetCurPage()."?".$arParams["ACTION_VARIABLE"]."=delay&id=#ID#",
  "add" => $APPLICATION->GetCurPage()."?".$arParams["ACTION_VARIABLE"]."=add&id=#ID#",
);

$arBasketJSParams = array(
  'SALE_DELETE' => GetMessage("SALE_DELETE"),
  'SALE_DELAY' => GetMessage("SALE_DELAY"),
  'SALE_TYPE' => GetMessage("SALE_TYPE"),
  'TEMPLATE_FOLDER' => $templateFolder,
  'DELETE_URL' => $arUrls["delete"],
  'DELAY_URL' => $arUrls["delay"],
  'ADD_URL' => $arUrls["add"]
);
?>
<script type="text/javascript">
  var basketJSParams = <?=CUtil::PhpToJSObject($arBasketJSParams);?>
</script>
<?
$APPLICATION->AddHeadScript($templateFolder."/script.js");

if (strlen($arResult["ERROR_MESSAGE"]) <= 0)
{
  ?>
  <div id="warning_message">
    <?
    if (is_array($arResult["WARNING_MESSAGE"]) && !empty($arResult["WARNING_MESSAGE"]))
    {
      foreach ($arResult["WARNING_MESSAGE"] as $v)
        echo ShowError($v);
    }
    ?>
  </div>
  <?

  $normalCount = count($arResult["ITEMS"]["AnDelCanBuy"]);
  $normalHidden = ($normalCount == 0) ? "style=\"display:none\"" : "";

  $delayCount = count($arResult["ITEMS"]["DelDelCanBuy"]);
  $delayHidden = ($delayCount == 0) ? "style=\"display:none\"" : "";

  $subscribeCount = count($arResult["ITEMS"]["ProdSubscribe"]);
  $subscribeHidden = ($subscribeCount == 0) ? "style=\"display:none\"" : "";

  $naCount = count($arResult["ITEMS"]["nAnCanBuy"]);
  $naHidden = ($naCount == 0) ? "style=\"display:none\"" : "";

  ?>
    <form method="post" action="<?=POST_FORM_ACTION_URI?>" name="basket_form" id="basket_form">
      <div id="basket_form_container">
        <div class="bx_ordercart">
          <div class="bx_sort_container">
            <span><?=GetMessage("SALE_ITEMS")?></span>
            <a href="javascript:void(0)" id="basket_toolbar_button" class="current" onclick="showBasketItemsList()"><?=GetMessage("SALE_BASKET_ITEMS")?><div id="normal_count" class="flat" style="display:none">&nbsp;(<?=$normalCount?>)</div></a>
            <a href="javascript:void(0)" id="basket_toolbar_button_delayed" onclick="showBasketItemsList(2)" <?=$delayHidden?>><?=GetMessage("SALE_BASKET_ITEMS_DELAYED")?><div id="delay_count" class="flat">&nbsp;(<?=$delayCount?>)</div></a>
            <a href="javascript:void(0)" id="basket_toolbar_button_subscribed" onclick="showBasketItemsList(3)" <?=$subscribeHidden?>><?=GetMessage("SALE_BASKET_ITEMS_SUBSCRIBED")?><div id="subscribe_count" class="flat">&nbsp;(<?=$subscribeCount?>)</div></a>
            <a href="javascript:void(0)" id="basket_toolbar_button_not_available" onclick="showBasketItemsList(4)" <?=$naHidden?>><?=GetMessage("SALE_BASKET_ITEMS_NOT_AVAILABLE")?><div id="not_available_count" class="flat">&nbsp;(<?=$naCount?>)</div></a>
          </div>
          <?
          include($_SERVER["DOCUMENT_ROOT"].$templateFolder."/basket_items.php");
          include($_SERVER["DOCUMENT_ROOT"].$templateFolder."/basket_items_delayed.php");
          include($_SERVER["DOCUMENT_ROOT"].$templateFolder."/basket_items_subscribed.php");
          include($_SERVER["DOCUMENT_ROOT"].$templateFolder."/basket_items_not_available.php");
          ?>
        </div>
      </div>
      <input type="hidden" name="BasketOrder" value="BasketOrder" />
      <input type="hidden" name="ajax_post" id="ajax_post" value="Y">
    </form>
  <?
}
else
{
  ShowError($arResult["ERROR_MESSAGE"]);
}
?>