sudo apt-get check
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
 libpurple-dev : Depends: libpurple0 (>= 2.10.9) but it is not installed
                 Depends: libpurple0 (< 2.10.9+1~) but it is not installed
 pidgin : Depends: libpurple0 (>= 2.8.0) but it is not installed
 pidgin-whatsapp : Depends: libpurple0 (>= 2.8.0) but it is not installed
E: Unmet dependencies. Try using -f.

apt-cache policy pidgin-whatsapp pidgin libpurple-dev libpurple0

sudo apt-get install aptitude

aptitude why-not package

aptitude why-not lsb-core:amd64
i   lsb-security Recommends lsb-core (>= 4.1+Debian12)
i A lsb-core     Conflicts  lsb-core:amd64