The Unsullied's master is sleeping. I think it should be signed as a typo (the -oti is tricky)
It should be "The Unsullied's masters are sleeping" in any case, because it is āeksia, and not āeksio, and ēdrusi instead of ēdrus. So it is more than just a typo, it's the wrong number of masters.
Thank you for the clarification. (This stuff is blowing my mind xD)