One of the disks had been removed.
Earlier in the thread the command: bcdedit | find "osdevice" displayed drive partition E:

Does this command only work when the disk that was removed is attached?
Does this command no longer work with the disk removed?

Please run these commands now using the Windows 10 iso with the disk removed and display the command and results into the thread:

bcdedit | find "osdevice"
wmic logicaldisk get deviceid, volumename, description

When available display the commands and results for 15 -20