Crash of VeloView due to main Window

I get an obscure crash of VeloView 3/06/2021.
There was a core dump on this line

As soon as you get this bug, none of the others application will work (paraview, ...) even in your other build.
To by pass this crash, you have to reboot your PC. This should be sufficient to launch VeloView again.
We suspect an environment variable set strangely by the Superbuild.

The bug appeared on the current master of VeloView and with Ubuntu 20.04.