Sign in with AppleWeb/Firebase shows invalid_request/Invalid web redirect url

Hello!

I configured my serviceID for apple sign in web with firebase.

I tried different Return URLs in the "Web Authentication Configuration Window". My own website with https and the firebase generated auth/handler url "https ://my-app.firebaseapp.com/_/auth/handler"

Every time I try to sign in with apple I get a window with "invalidrequest Invalid web redirect url

Thanks