Facebook Open Graph，未提供类型为“string"的必需属性“og:title"

I have a Joomla-page (v3.2.4) where I put in some dynamic Open Graph tags with PHP, like this:

标签前的 PHP:

$getcid = JRequest::getVar('id');

if(!isset($getcid)) {
    $title = "LIVA Kurser";
    $description = "Danmarks største udbyder af kurser til såvel offentlige og erhverv samt private.";
    $image = "http://www.livakursertestsite.dk/images/liva-logo.jpg";
    $type = "website";
} else {
    $db = JFactory::getDbo();
    $user    = JFactory::getUser();
    $query = $db->getQuery(true);
    $ogquery = "SELECT DISTINCT * FROM jos_managecourse WHERE state = '1' AND id = '".$getcid."' LIMIT 1";
    $db->setQuery($ogquery);
    $db->query();
    $getcourse = $db->loadObjectList();  
      
    $description = substr(strip_tags($getcourse[0]->details), 0, 247);
    $title = $getcourse[0]->course_name;
      
    $description = preg_replace( "/|
/", "", $description );
    $description = str_replace( " ", " ", $description );
      
    $image = JURI::root()."administrator/components/com_managecourse/images/".$getcourse[0]->image_url;
    $type = "article";
}

在我的标签中，我有这个:

  <!-- Facebook Open Graph -->
  <meta property="fb:app_id" content="502033806595590" />
  <meta property="og:site_name" content="LIVA Kurser" />
  <meta property="og:type" content="<?php echo $type; ?>" />
  <meta property="og:title" content="<?php echo $title; ?>" />
  <meta property="og:url" content="<?php echo JURI::current(); ?>" />
  <meta property="og:image" content="<?php echo $image; ?>" />
  <meta property="og:description" content="<?php echo $description; ?>..." />
  <!-- End Facebook Open Graph -->

<meta property="og:locale" content="da_DK" />
<meta property="og:type" content="website" />
<meta property="og:title" content="LIVA Kurser" />
<meta property="og:description" content="Beskrivelse..." />
<meta property="og:url" content="http://www.livakursertestsite.dk/kurser" />
<meta property="og:image" content="http://www.livakursertestsite.dk/images/liva-logo.jpg" />
<meta property="fb:app_id" content="502033806595590" />
<meta property="og:site_name" content="LIVA Kurser" />