What basically happens now after AoD launch, is that I cannot assign ANY new active Doff any more. The available Doff from your roster show up sorted by department, specialization and rarity, so far, so good. But when you actually try to pick one, up comes only a blank slate, which you obviously can NOT slot. No picture, no name, no description just a blank box. The ones slotted before AoD deployment stay there, but otherwise the system. Is broken, cannot swap out or reorganize the active Doffs any more.
At first glance looks like a database access issue to me. Please try to fix it, as otherwise the Doff system loses about half its functionality, ship setups become way more static and limited and in the end getting new ships barely attractive.