Version 2020 bug? - Code-Aster ASTK EXIT_CODE =127

Hello everyone,
I tried to use Code-Aster ASTK as located in /opt/caelinux/astk.sh. My calculation however immediately fails and I get an error "EXIT_CODE =127". The fix as described in the following youtube video does not work for me.
But if I open ASTK via Salome-Meca 2019 > AsterStudy > Tools > Plugins > "Run astk", it works perfectly.
I suppose this is a (small) bug? Does anyone know the directory of the working astk program (I wasn't able to find it for now), in order to fix the shortcut? The shortcut to the working astk program is /opt/SalomeMeca/V2019_univ/tools/Code_aster_frontend-20190/bin/astk .
Thank you!
Emmanuel