Cannot login. 2 devices - 2 different errors

[math-GH]

I cannot login.

I have 2 different Android devices:
Device 1: Android 6.0.1 (yes, it is an old one).
Error message:

Authentication was not successful. 
Maybe there is no internet connection?
Error Message: HandshakeException: Handshake error in client (OS Error:
CERTIFICATE_VERIFY_FAILED: certificate has expired(handshake.cc:393))

If I check the "Ignore invalid certificate.' then the error message Username and/or Password is incorrect! appears

Device 2: Android 12
Error message:
Username and/or Password is incorrect!

I am sure, that I use the correct credentials (2FA is enabled in Nextcloud).

In both cases the checkbox "Use self generated App Password. Needed for accounts with 2FA.' is checked.

Any idea how to solve this issue?

[bcurran3]

I had this same problem, here's how to solve it:
Go to Personal Settings/Security/Devices & sessions and create a new app password. Then use the provided password as your login password in the app.

[math-GH]

Great. Thanks. It works.

It would be cool to have this information added in the documentation