I'm implementing "Sign in with Apple ID" feature in Node.js application, using @hapi/bell library.
Unfortunately, my attempts resulted in being redirected to following webpage:
There is almost certainly configuration mismatch somewhere, but Apple decided to show no information what is difference between actual value and expected value.
I managed to find actual cause (redirect_url being set to http://example.com instead of https://example.com), but is there any Apple-specific way to debug it better?