I already opened a thread for a similar issue, so apologies if this souds repetitive, but I think this expands enough that it's worth its own post. I'd open a bug, but there's no documentation on Nura's website afaics on how to do that.
I'm trying to test Nura's OS installer, available at this page: https://images.nura.eco/bpo/edge/generic-x86_64/os-installer/ to then install Nura on some old computers. Initially I downloaded the image and added it as a cd-rom in qemu, but it wouldn't boot from there. After some other tests, someone on Nura's Matrix channel said that it may not work on qemu because of... something, so I decided to try and flash it on a usb stick with Balena as explained here: https://wiki.nura.eco/wiki/OS_Installer (worth noting the the wiki already calls the images Nura-*.img, but they are still -postmarketOS-.img) and booting it on my laptop. However, the boot fails in this case as well, so definitely the image is not capable of booting. I tried both 20261009-1342 and 20261002-1243 images, and both fail.
Can someone look into it, or at least tell me how to open a proper bug so that it reaches the developers?