Qt5 applications broken: could not find or load the Qt platform plugin "xcb"

[Marco Beishuizen]

Hi,

All Qt5 applications seem to be broken. When trying to start either of 
them, I get:

[...]
Fatal: This application failed to start because it could not find or load 
the Qt platform plugin "xcb"
in "".

Available platform plugins are: minimal, offscreen, xcb.

Reinstalling the application may fix this problem.

Abort (core dumped)
[...]

Reinstalling any of them didn't make a difference. Does anyone know what 
I'm missing here?

Regards,

Marco


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