When I launche dolphin from an kterm/xterm, I get a popup with the following string and an OK button appears: There are two actions (New Tab, New Tab) that want to use the same shortcut (Ctrl+T). This is most probably a bug. Please report it in bugs.kde.org
Can someone backport the upstream bug fix mentioned in https://bugs.kde.org/show_bug.cgi?id=398324?