Failed installation to external SSD of Monterey
An error occurred while setting “Untitled” as the startup disk: The operation couldn’t be completed. (SDErrorDomain error 104.)
I came back after the installation completed to find my Early MacBook Book Pro 2015 booted into boot camp. I restarted the computer back in Mac OS with the startup manager, and the USB drive wasn't there. So I restarted into MacOS, and found that I had to reconnect the hard drive, and checked System Preferences -> Startup Disk. Tried to select the Monterey installed external drive, and got the above error. What on earth is this about? Do I need to reinstall?