Today Software from The GNOME Project indicated it is finally time to upgrade to F38.
Without any hesitation, I clicked the Download, then Install and Reboot buttons.
After my system rebooted to my surprise I was prompted to follow the same process again… the problem is now that I am no longer in the sudoers file, and for whatever reason, I need to log in to the Administrator account, to which I have no access.
You also could boot to single user mode as root by modifying the grub command line during boot and removing quiet rhgb and adding at the end /bin/bash. This results in a boot directly to the command line as the root user where repairs can be made then another boot finishes the recovery.