[error] Client error: `GET https://www.youtube-nocookie.com/` resulted in a `404 Not Found`

It appears checking that https://www.youtube-nocookie.com/ is active breaks Drupal cron because this URL returns a 404 rather than 200.

$ curl -I https://www.youtube-nocookie.com/
HTTP/2 404 
...

I found this issue on the BISA site (https://support.agile.coop/bisa/support/problems-running-drupal-cron), but it's not clear how many other sites are using this version of the module.