I also noticed that the 2fa isn't working for me too.
I generate the first code to test the application, that works, but when i want to log in later, it doesn't recognize the code, and i have to use a backup code

2-factor is: 7.4.0
Board is: v3.5.1.

when i try to add a hardware key i instantly get the message "hardware key registration abborted" and in the logs i found this:
2023-11-20T06:03:39.301Z [4567/995] - info: [plugin/2factor] Denying socket access for uid 2 pending second factor.

Any idea how I can fix this?