OK, I was able to trace down the issue. It happened that there is an empty file .config/kglobalshortcutsrc.lock which caused the startup to hang. After removing that file, all is working again.
OK, I was able to trace down the issue. kglobalshortcut src.lock which caused the startup to hang. After removing that file, all is working again.
It happened that there is an empty file .config/