Why does it display errors when displaying captcha from google?

Question

PHP

Throws an error on page load: The source list for Content Security Policy directive 'script-src' contains an invalid source: ''strict-dynamic''. It will be ignored.
I can not understand the reason, tell me.

<?php
require 'templates/header.php';

define('SITE_KEY', '..........................................');
define('SECRET_KEY', ..........................................');
if($_POST){
    function getCaptcha($SecretKey) {
        $Response = file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=".SECRET_KEY."&response={$SecretKey}");
        $Return = json_decode($Response);
        return $Return;
    }
    $Return = getCaptcha($_POST['g-recaptcha-response']);
    var_dump($Return);
    if($Return->success == true && $Return->score > 0.5){
        echo "Проверка пройдена. Сообщение отправлено!";
    } else {
        echo "You are Robot";
    }
}
?>


<section class="registration main">
  <div class="row">
    <div class="col-12 reg__ramka">
      <div class="row">
        <div class="col-6">

        </div>
        <div class="col-6">
          <h3>Регистрация</h3>
          <form method="post" id="form_reg" action="/">
            
            <p id="reg_message"></p>
            <div id="form_registration">
              <ul class="form__reg_ul">
                <li>
                  <label class="form__reg_label">Телефон:</label>
                  <span class="reg_star">*</span>
                  <input type="text" name="reg_phone" id="reg_phone">
                </li>
                <li>
                  <label class="form__reg_label">e-mail:</label>
                  <span class="reg_star">*</span>
                  <input type="text" name="reg_email" id="reg_email">
                </li>
                <li>
                  <label class="form__reg_label">Пароль:</label>
                  <span class="reg_star">*</span>
                  <input type="text" name="reg_pass" id="reg_pass">
                  <span id="genpass">cгенерировать</span>
                </li>
                <li>
                  <label class="form__reg_label">Имя:</label>
                  <span class="reg_star">*</span>
                  <input type="text" name="reg_name" id="reg_name">
                </li>
                <li>
                  <input type="hidden" id="g-recaptcha-response" name="g-recaptcha-response">

<script src="https://www.google.com/recaptcha/api.js?render=<?php echo SITE_KEY;?>"></script>							
<script>
        grecaptcha.ready(function() {
            grecaptcha.execute('<?php echo SITE_KEY;?>', {action: 'homepage'}).then(function(token) {
                // console.log(token);
                document.getElementById('g-recaptcha-response').value=token;
            });
        });
  </script>
                </li>
              </ul>
              <div class="form__reg_button">
                <button type="submit" name="reg_submit" id="reg_submit">Регистрация <i class="fa fa-chevron-right" aria-hidden="true"></i></button>
              </div>
            </div>
          </form>
        </div>
      </div>
    </div>
  </div>
</section>

<?php
require 'templates/footer.php';
?>

Answer 1

https://developer.mozilla.org/en-US/docs/Web/HTTP/...
We look at the table and see that strict-dynamic is not supported by all browsers.
If these rules are on the side of Google, then you cannot do anything.

advice

используйте нормальный браузер