Failed to execute fallback shell - suddenly appeared after update after

“!!! Failed to execute fallback shell” - appeared after system update on recent Fedora 35. None of previous version work. Not even rescue version. Is there any solution (except reinstall of all system) ?

Something must be broken with systemd during the upgrade. You could try use liveusb, then chroot it. After that run dnf distro-sync to find and install broken packages.

Here on how to chroot from Fedoramagazine.

Thanks for quick reply))
I’ll try and write down the result.