I’m on Debian Testing and receive thisstrange message when open Dolphin today, if I not forget when I upgraded some kde packages were upgrade. Unable to create io-slave. klauncher said: Error loading ‘/usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kio/file.so’. Please tell me how can I solve this issue.
Have you just updated your system? If so, chances are the currently running version isn’t compatible with the newly installed libraries. A simple logout / reboot should resolve the issue. If that’s not the case, it sounds like a Debian Testing package is currently broken or missing a dependency. It happens, it’s a testing version after all.