I tried to install Qubes 4 on my Librem 13, but as soon as the graphical installer tries to ask for the language it crashes. (python AttributeError)
Qubes 3 on Librem 13 works fine.
Qubes 4 on a different laptop works fine, too.
Therefore it seems that that installer does not like this hardware for some reason.
I tried to send out a bug report, but first it is not trivial to set up networking in the unfinished installer and after I got network working the bug report tool was not able to submit the bug, because it tries to use the unknown ‘Generic’ product.
Maybe someone here will have a closer look at the issue and create a proper bug report.