网站中添加了Google评论片段，但Google搜索未显示星级评分

Question

我有一个网站http://xpandable.online，该网站的所有者希望在该网站的google搜索中显示总的google评分。我在下面的标题部分中添加了评论代码段。我在一周前添加了此代码段。谁能找到问题，并请建议我适当的解决方案？

  <script type="application/ld+json">
  {
    "@context": "https://schema.org/",
    "@type": "Organization",
    "name": "Xpandable",
    "image": "http://www.xpandable.online/images/header-logo.jpg",
    "description": "Xpandable is one of the leading digital marketing companies in USA, Lebanon and the Middle East. Our customers maximize yield, monetization and campaign effectiveness with our state of the art technology.",
    "aggregateRating": {
      "@type": "AggregateRating",
      "ratingCount": 11,
      "bestRating": "5.0",
      "worstRating": "1.0",
      "ratingValue": "4.6"          
    }
  }
  </script>