Merhaba, elimde şöyle bir register.php dosyası var ama bu dün geceden beri çalışmıyor.

Acaba sorun ne olabilir? teşekkürler.

<?php
defined('BASEPATH') or exit('No direct script access allowed');
?>
<!DOCTYPE html>
<html lang="<?php echo $this->config->item("language"); ?>">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title><?php echo $this->lang->line("register"); ?> - <?php echo $this->config->item("site_name"); ?></title>
    <?php echo $this->config->item("extra_header"); ?>
    <link href="<?php echo base_url('assets/modern-theme/css/bootstrap.min.css?v=1'); ?>" rel="stylesheet" type="text/css">
    <link href="<?php echo base_url('assets/modern-theme/css/metismenu.min.css?v=1'); ?>" rel="stylesheet" type="text/css">
    <link href="<?php echo base_url('assets/modern-theme/css/icons.css?v=1'); ?>" rel="stylesheet" type="text/css">
    <link href="<?php echo base_url('assets/modern-theme/css/style.css?v=1'); ?>" rel="stylesheet" type="text/css">
    <link href="<?php echo base_url('assets/css/sweetalert2.min.css') ?>" rel="stylesheet" type="text/css">
    <script src="<?php echo base_url('assets/modern-theme/js/jquery.min.js') ?>"></script>
    <?php echo $this->config->item("extra_header"); ?>
    <script src="https://www.google.com/recaptcha/api.js?render=<?php echo $this->config->item("recaptcha_site_key"); ?>">
    </script>
    <script>
        grecaptcha.ready(function() {
            grecaptcha.execute('<?php echo $this->config->item("recaptcha_site_key"); ?>', {
                action: 'register'
            }).then(function(token) {
                var recaptchaResponse = document.getElementById('recaptchaResponse');
                recaptchaResponse.value = token;
            });
        });
    </script>
</head>

<body>
    <div class="bg-light text-center position-relative vw-100" style="z-index:10">
        <div class="container py-2">

        </div>
    </div>
    <div class="accountbg"></div>
    <div class="wrapper-page">
        <div class="card card-pages shadow-none">
            <div class="card-body">
                <div class="text-center"><a href="<?= base_url() ?>" class="logo logo-admin"><img src="/assets/img/logo-dark.png" alt="Logo" height="50"></a></div>
                <h4 class="text-center h3"><?php echo $this->lang->line("register"); ?></h4>
                <form class="form-horizontal m-t-30" action="/ajax/register" method="post">
                    <div class="form-group pt-3">
                        <div>
                            <label><i class="fas fa-user mr-2"></i><?php echo $this->lang->line("name"); ?>:</label>
                            <input name="name" class="form-control" type="text" required="" placeholder="<?php echo $this->lang->line("enter_name"); ?>">
                        </div>
                    </div>
                    <div class="form-group pt-3">
                        <div>
                            <label><i class="fas fa-envelope mr-2"></i><?php echo $this->lang->line("email_adress"); ?>:</label>
                            <input name="email" class="form-control" type="email" required="" placeholder="<?php echo $this->lang->line("enter_email"); ?>">
                        </div>
                    </div>
                    <div class="row">
                        <div class="col-md-6">
                            <div class="form-group pt-3">
                                <div>
                                    <label><i class="fas fa-key mr-2"></i><?php echo $this->lang->line("password"); ?>:</label>
                                    <input name="password" class="form-control" type="password" required="" placeholder="<?php echo $this->lang->line("enter_password"); ?>">
                                </div>
                            </div>
                        </div>
                        <div class="col-md-6">
                            <div class="form-group pt-3">
                                <div>
                                    <label><i class="fas fa-key mr-2"></i><?php echo $this->lang->line("password_again"); ?>:</label>
                                    <input name="password_again" class="form-control" type="password" required="" placeholder="<?php echo $this->lang->line("enter_password"); ?>">
                                </div>
                            </div>
                        </div>
                    </div>
                    <div class="form-group text-center pt-3">
                        <div>
                            <button class="btn btn-primary btn-block btn-lg waves-effect waves-light" type="submit"><?php echo $this->lang->line("register"); ?></button>
                        </div>
                    </div>

                    <div class="form-group row pt-3">
                        <div class="col-sm-7">
                            <a href="<?php echo base_url("reset-password"); ?>" class="text-muted"><i class="fa fa-lock m-r-5"></i><?php echo $this->lang->line("forgetten_password"); ?></a>
                        </div>
                        <div class="col-sm-5 text-left text-lg-right mt-2 mt-lg-0">
                            <a href="/login" class="text-muted"><i class="fas fa-sign-in-alt m-r-5"></i><?php echo $this->lang->line("login"); ?></a>
                        </div>
                    </div>
                    <input type="hidden" name="recaptcha_response" id="recaptchaResponse">
                </form>
            </div>

        </div>
    </div>

    <script src="<?php echo base_url('assets/modern-theme/js/bootstrap.bundle.min.js?v=1') ?>"></script>
    <script src="<?php echo base_url('assets/modern-theme/js/metismenu.min.js?v=1') ?>"></script>
    <script src="<?php echo base_url('assets/modern-theme/js/jquery.slimscroll.js?v=1') ?>"></script>
    <script src="<?php echo base_url('assets/modern-theme/js/waves.min.js?v=1') ?>"></script>
    <script src="<?php echo base_url('assets/modern-theme/js/app.js?v=1') ?>"></script>
    <script src="<?php echo base_url('assets/js/sweetalert2.all.min.js') ?>"></script>
    <script src="<?php echo base_url(); ?>assets/js/auth.js"></script>
    <?php echo $this->config->item("extra_footer"); ?>
</body>

</html>