Hi, I had the same problem (in xfce). These are the messages in shell:
Icon theme "crystalsvg" not found. Can not find 'kdeinit5' executable at "/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin" Can not find 'kdeinit5' executable at "/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin" Can not find 'kdeinit5' executable at "/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin" kf5.kio.core: couldn't create slave: "No s'ha pogut comunicar amb el klauncher: The name org.kde.klauncher5 was not provided by any .service files" KServiceTypeTrader: serviceType "ThumbCreator" not found KServiceTypeTrader: serviceType "ThumbCreator" not found No file found for ".xml" , even though update-mime-info said it would exist. Either it was just removed, or the directory doesn't have executable permission... ("/usr/share/mime") KServiceTypeTrader: serviceType "ThumbCreator" not found KServiceTypeTrader: serviceType "ThumbCreator" not found Can not find 'kdeinit5' executable at "/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin" Can not find 'kdeinit5' executable at "/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin" kf5.kio.core: couldn't create slave: "No s'ha pogut comunicar amb el klauncher: The name org.kde.klauncher5 was not provided by any .service files" The problem is solved by installing the kinit package. Dear Maintainer, consider add kinit dependency on the package. Regards! I. De Marchi