After I reinstalled the game and mods and started a new game everything worked fine when I met Isra. I was hoping to allow her to use bows, however, and when I noticed she couldn't it did not occur to me that the Ashes of Embers feature of removing weapon restriction might not extend to kit restrictions. Instead, I wondered if the reason was because I had installed AoE before Isra, so I uninstalled and reinstalled AoE. Of course, this did not work and now Isra has no voice. Is there any way to recover it? I hope my bungling is at least somewhat entertaining.