Getting 'You are in emergency mode. After logging in, type "journalctl -xb" to view system logs, "systemctl reboot" to reboot, "systemctl default" or "exit" to boot into default mode' after rebooting Linux Mint 21.1 Vera

On my Linux Mint 21.1 Vera machine, rebooting the machine would show the following early in the boot process

You are in emergency mode. After logging in, type "journalctl -xb" to view system logs, "systemctl reboot" to reboot, "systemctl default" or "exit" to boot into default mode.
Press Enter for maintenance
(or press Control-D to continue):

For my specific case this happended because I have a USB drive connected to the CPU. Removing the the USB drive and rebooting the machine allow me to continue with the boot process.