Domain featuredetect.passkeys.dev isn't working

[piradoiv]

Technical issue with website

Description

Cannot load https://featuredetect.passkeys.dev/, that it's linked from the Device Support page (https://passkeys.dev/device-support/)

Steps to reproduce

1. Go to https://passkeys.dev/
2. Click on Device Support nav link
3. Click on "Test this client!" button

Expected result

https://featuredetect.passkeys.dev/ should load

Actual result

The page won't load. Chrome says "ERR_NAME_NOT_RESOLVED"

Environment

macOS 26.2, tested with Safari 26.2 (21623.1.14.11.9) and Google Chrome 143.0.7499.194 (Build oficial) (arm64)