Fetch custom fields in a module

<?php
$baseurl = JUri::base();
$article = JTable::getInstance("content");
$article_id = JRequest::getVar('id');
$article->load($articleid);
$cactid = $article->get('catid');

JLoader::register('FieldsHelper', JPATH_ADMINISTRATOR . '/components/com_fields/helpers/fields.php'); //load fields helper
// incorrect is bellow
// $fields  = FieldsHelper::getFields('com_content.article', $article, true);
// correct is bellow
$fields  = FieldsHelper::getFields('com_content.article', ['id'=> $article_id]);
?>
<?php foreach ($fields as $field) : ?>
<?php $value = $field->value;
echo $value;?>
<?php endforeach;?>