I've installed Kubuntu PPA backports for Wily (but with the same Dolphin version 4:15.08.2-0ubuntu1) and the error was the same:
KDEIinit could not launch "/usr/lib/x86_64-linux-gnu/libexec/kf5/kioexec".
I've installed Kubuntu PPA backports for Wily (but with the same Dolphin version 4:15.08.2-0ubuntu1) and the error was the same:
KDEIinit could not launch "/usr/lib/ x86_64- linux-gnu/ libexec/ kf5/kioexec" .