[Interest] Failed to start Assistant, Designer...

[Koehne Kai]

>> Please make sure no environment variable QT_PLUGIN_PATH is set in your shell.
>> See also https://bugs.kde.org/show_bug.cgi?id=349371
>
>
> igor at gmi:~/Qt/5.5/gcc_64/bin$<mailto:igor at gmi:~/Qt/5.5/gcc_64/bin$> echo $QT_PLUGIN_PATH
> /usr/lib/x86_64-linux-gnu/qt5/plugins:/lib/kde5/plugins/

Right. Unset it by e.g. executing

export QT_PLUGIN_PATH=

You can also make this permanent by addingthis your .bashrc (if you're using bash).

You might also consider filing a bug to Kubuntu.

Regards

Kai
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