Passwordless authentication with Yubikey doesn't work

Steps to reproduce

1. Add a yubikey to your passwordless options for your account (make sure its your only passwordless option)
2. Open the nextcloud app and type your server address
3. Go to login with a device
4. Type your username and press Enter
5. Nothing happens

Expected behaviour

When logging in, it should asks for my Yubikey with an iOS popup. Since its a NFC Yubikey, you shoud approach it from your phone and it will logs in to your account automatically.

Actual behaviour

Nothing happens after trying to log in.

Screenshots

Screenshot isn't needed, it doesn't show any error messages or loading screens.

Logs

today at 22:31:48 #IP# - - [11/Sep/2022:20:31:48 +0000] "POST /login/webauthn/start HTTP/1.1" 200 1014 "-" "iPhone (Nextcloud iOS)"
today at 22:31:48 #IP# - - [11/Sep/2022:20:31:48 +0000] "POST /login/webauthn/finish HTTP/1.1" 500 5704 "-" "iPhone (Nextcloud iOS)"

Reasoning or why should it be changed/implemented?

When using Safari, everything works as expected and the Yubikey NFC works with Nextcloud. It should acts the same for the iOS app.

Environment data

iOS version: iOS 16.0 Beta

Nextcloud iOS app version: 4.4.3.0

Server operating system: Docker

Web server: Apache, nginx

Database:

PHP version:

Nextcloud version: 24.0.5

Start by reproducing the iOS app's “login with a device” flow with a single NFC YubiKey option, then inspect the POST requests to /login/webauthn/start and /login/webauthn/finish alongside the supplied logs. Compare the app flow with Safari, and consider the issue done when the iOS app presents the expected YubiKey NFC prompt and completes login.