not possible to delete any photo : "digikam could not start process unable to create io-slave klauncher said unknown protocole 'trash'" Reproducible: Always
KDE installation broken or uncomplete. It's a distro problem : KDE Kioslave are not available Gilles Caulier
Distro problems should be close as "Downstream".
This problem is not reproducible since 5.0.0 as all digiKam KIO slave was replaced by a multithreaded interface to play with database