Demo query returns error

[brady-aiello]

The sample query in the demo:

{
  lookup {
    artist(mbid: "5ca3f318-d028-4151-ac73-78e2b2d6cdcc") {
      name
      mediaWikiImages {
        url
        objectName
        descriptionHTML
        licenseShortName
      }
    }
  }
}

returns

{
  "errors": [
    {
      "message": "certificate has expired",
      "locations": [
        {
          "line": 5,
          "column": 7
        }
      ],
      "path": [
        "lookup",
        "artist",
        "mediaWikiImages"
      ]
    }
  ],
  "data": {
    "lookup": {
      "artist": null
    }
  }
}

[exogen]

It looks like MusicBrainz-only queries work fine (most of them from the README of this project are returning normally), but it's having trouble with MediaWiki specifically? Is that what you're seeing too?