尝试设置打印机时发出Gtk警告

Question

我正在尝试在最近安装的ubuntu 18.04计算机上为我的系统设置我的打印机。当我点击＆＃34;其他打印机设置＆＃34;在“设置”中，出现以下错误：

<script data-no-instant type="application/ld+json">
{
    "@context": "http://schema.org",
    "@type": "CollectionPage",
    "description": "",
    "url": "https://store.com/collections/products",
    "name": "Products",
    "mainEntity": {
    "@type": "ItemList",
        "numberOfItems": "3",
        "itemListOrder": "Unordered",
    "itemListElement": [

        {
          "@type": "ListItem",
          "position": 1,
          "url": "https://store.com/products/product-1"
        },
        {
          "@type": "ListItem",
          "position": 2,
          "url": "https://store.com/products/product-2"
        },
        {
          "@type": "ListItem",
          "position": 3,
          "url": "https://store.com/products/product-3"
        }
    ]
  }
}
</script>

通过环顾四周，我看到之前出现此错误的实例，但不是我可以与此相关的方式。知道发生了什么事吗？