Missing acolytes? What do you mean that she won't give it to you?
Either you all ready doing a quest or you might need to reach a certain day before Othra can give this quest to you, try doing the story quests in the human town until you finish the one for giving her about 7 Restrain Potions, if my info does not work, have a look in this link and book mark it for future used: https://docs.google.com/spreadsheets/d/1kk1nVwdcqxsqkysRpLgMoRE0wKDOmMXYfxKpDsBl...
The tabs at the bottom have different sections to look at, the left and right arrows on the bottom right when looking at the bottom bar can be clicked/tapped on to show more of the tabs that are not visible when looking in there, her name can be found by clicking/tapping the right arrow once.