проблема с корзиной Опенкарт 2.3

Undefined offset: 1 in /sata2/home/users/.../www/.../catalog/view/theme/theme685/template/common/cart.tpl on line 35



<div class="btn-remove__cnt">
<button type="button" onclick="cart.removeAndSave(<?php echo (explode('product_id=', $product['href'])[1]); ?>, '<?php echo $product['cart_id']; ?>');" class="link"> 35строка
<i class="material-design-favorite21"></i></button>
<button type="button" onclick="cart.remove('<?php echo $product['cart_id']; ?>');" class="link">
<i class="fa fa-trash-o"></i></button>
<button data-action="cancel" type="button" class="link">
<i class="material-design-close47"></i></button>
</div>

Проверьте содержание вашего масива $product