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Hello Alex,

I’m not sure Ubuntu 16.04 LTS has everything installed by default that the Qt graphics framework is looking to run in the X windows server.  

You could try installing, 

$ sudo apt-get update
$ sudo apt-get install libx11-dev  libxext-dev  libxrandr2  libxrender-dev

- R.

On Sep 7, 2020, at 01:52, Alex White <alexander.l.white@gmail.com> wrote:

Qt: XKEYBOARD

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