This happened to me too. I discovered that when you arrive in Sayuka, if you go to the workshop and talk to them before talking to Fleetmaster Okaya, the quest won't show up in your journal. You could try going back to talk to the Fleetmaster, if you didn't before.
I tried and this works. Lost a little less than an hour of play but not that big of a deal (vs having to choose another faction).