"Calculator" results are not displayed.

The scopes scope server has a calculator built-in, and it seems to not be working for a while (it used to work a couple of months ago)

For example, searching for 20 miles in km gives this result:

{"category": {"id": "calculator", "render_template": "{\"schema-version\": 1, \"components\": {\"mascot\": \"mascot\", \"title\": \"title\"}, \"template\": {\"category-layout\": \"grid\", \"card-size\": \"large\", \"card-layout\": \"horizontal\"}}", "title": "Result"}}
{"result": {"cat_id": "calculator", "mascot": "https://dash.ubuntu.com/imgs/art/calculator.svg", "preview_info": {"type": "calculator"}, "title": "20 miles in km = 32.18688 km"}}

But nothing is displayed.