Nicolas FRANCOIS wrote: > So I'm stuck. The 32 bits architecture is set (for Steam), so this > could'nt be the problem? And it used to work on Debian 10... > > If someone has an idea, I'm all ears :-) AFAIK Debian 11 does not offer Qt4 which obviously is used by the app. Perhaps consider using a jail or chroot or just a copy of the libraries are needed.