so we’re talking about interactive prompting here, not the –passphrase option. Neither one likes empty:
System.ArgumentException: Empty passphrase not allowed
ErrorID: EmptyPassphrase
Empty passphrases are not allowed
For whatever it’s worth, Linux does not echo interactive password entry. I don’t know Windows’ limits.
If not handling the passphrase in any way will do, try adding –no-encryption=true to the command line.
I don’t know if you ever want to use this backup from the GUI, e.g. to more easily select files to restore.
The way to achieve that is to have GUI set things up, then Export As Command-line and edit if desired.
There’s a bit more exported than essential (some values are defaults). You do get --no-encryption=true, along with some others –encryption-module= and –disable-module=console-password-input that were insufficient in my test to attain the no-password-entering goal, but --no-encryption=true by itself worked.
I don’t do much CLI, so someone else may have more to say, but this is what seemed to work for me…