It is definitely possible but the error message is not clear to me.
Can you post the specific error?
Have you synchronized your windows PC to any cloud file before?
Typing from a mobile device, I'll simply say both profiles regardless
of their name need to point to the same cloud file. You can set how
your windows system handles conflicts when the data doesn't match
(e.g. you edited on both the PC & android device). I have mine setup
to ask so I can choose each time.
After setting the conflict resolution you should be able to move
forward relatively worry free & experiment.