Harness status: Error

Unhandled rejection: Illegal constructor

TypeError: Illegal constructor
    at frame_constructor (https://xn--n8j6ds53lwwkrqhv28a.wpt.live/fenced-frame/resources/utils.js:344:22)
    at attachOpaqueContext (https://xn--n8j6ds53lwwkrqhv28a.wpt.live/fenced-frame/resources/utils.js:311:18)
    at async init (https://xn--n8j6ds53lwwkrqhv28a.wpt.live/fenced-frame/automatic-beacon-unfenced-top.https.html:28:23)