Ajax jQuery working fine in XAMPP but whenever I do upload in hpanel of Hostinger it doesn’t work. please check my code

<script type="text/javascript">
        $(document).on('submit', '#ajax-form', function (e) {
        e.preventDefault();

        var formData = new FormData(this);
        formData.append("comment", true);

        $.ajax({
            type: "POST",
            url: "postcomment.php",
            data: formData,
            processData: false,
            contentType: false,
            success: function (response) { 
                location.reload(true);                    
            }
        });

    });
    </script>