I asked when you updated because some users are having issues booting due to an update of systemd.
In the chroot environment, try editing /etc/default/grub. You will see a line GRUB_CMDLINE_LINUX_DEFAULT=""
At the end of that line within the quotations, try adding:
SYSTEMD_CGROUP_ENABLE_LEGACY_FORCE=1 systemd.unified_cgroup_hierarchy=0
Then run:
sudo grub-install && sudo update-grub
Then reboot and see if it works.
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