Hello, downgrading `optclient` to the bookworm version (which implies the installation of libcotp12) fixes the problem for me.
(please note, that *new* OTP keys created in a newer version of otpclient need to be discarded and created again) I just opened an upstream issue [1] for otclient regarding the strict version requirement. Lars [1] https://github.com/paolostivanin/OTPClient/issues/329
