Hello, Albert with Security Team hat here.
Trojitá hasn't been released for over 5 years and doesn't seem to have any active developers left. It has a [reasonably important] security issue and we need someone to take care of it https://bugs.kde.org/show_bug.cgi?id=432353 If no one steps up in 1 month we will ask sysadmin to move Trojitá to unmaintained Cheers, Albert