Invisible dialog box during software installation

[Jean-Michel Ubuntu]

Hello,

I tried to install Simflow on Virtualbox with Ubuntu 24.04 (but I also tried on 23.10, and I have the same problem). I followed the step
described on their website : I downloaded the file from the website, I checked the box "Executable as Program", and when I double clicked to run it, I can see that a dialog box icon has appeared on the left, but I can't see the dialog box on the screen (and therefore can't install the software). When I right clicked on the icon, I cannot quit. And when I look at the window on the different screen, I can see that I am on the right one because the same icon appears on the screen I look at, but I cannot see anyhting else (no text, no button "Yes" or "No" as I expect).

Thank you in advance for your reply.

[klaus]

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