Unable to login with AppleID

I followed the instruction here.
https://auth0.com/blog/try-sign-in-with-apple-in-your-auth0-apps-today/

However, 502 was returned. I am quite sure my Client ID, Client Secret Signing Key, Apple Team ID and Key ID are correct.

{
  "error": "access_denied",
  "error_description": "Request failed with status code 502"
}

Here is the link to test:
https://mypixie.auth0.com/authorize?client_id=CrGWLw95TufZ_ivebLL1O1Tce-C5eNpT&response_type=code&connection=apple&prompt=login&scope=openid%20profile&redirect_uri=https://manage.auth0.com/tester/callback?connection=apple

Is there any other experiencing the same problem? It was working when I added apple login a few months ago.

Hey there!

Can you make sure whether you changed something in the meantime in this implementation whether it’s in your code or in your Auth0 dashboard?