As seen in the screenshot, this page is loading something insecure.
I think it is these HTML stuff, but not sure.
<link rel="icon" href="http://diff.wikimedia.org/wp-content/uploads/2020/07/cropped-1024px-Wikimedia-logo.svg_.png?w=32" sizes="32x32"> <link rel="icon" href="http://diff.wikimedia.org/wp-content/uploads/2020/07/cropped-1024px-Wikimedia-logo.svg_.png?w=192" sizes="192x192"> <link rel="apple-touch-icon" href="http://diff.wikimedia.org/wp-content/uploads/2020/07/cropped-1024px-Wikimedia-logo.svg_.png?w=180"> <meta name="msapplication-TileImage" content="http://diff.wikimedia.org/wp-content/uploads/2020/07/cropped-1024px-Wikimedia-logo.svg_.png?w=270">




