schema.org free plugin causing SSL issues

The free version is adding an http link, which is causing my site to display as not secure. How can I fix this?

<script type="application/ld+json">
{
  "@context": "http://schema.org",
  "@type": "WebSite",
  "@id": "#website",
  "name": "Datablaze",
  "alternateName": "IoT Management",
  "url": "https://datablaze.com/",
  "potentialAction": {
    "@type": "SearchAction",
    "target": "https://datablaze.com/?s={search_term_string}",
    "query-input": "required name=search_term_string"
  }
}
</script>

• This topic was modified 5 years, 10 months ago by Yui.
• This topic was modified 5 years, 10 months ago by Yui. Reason: please use CODE button for code formatting

The page I need help with: [log in to see the link]