I loaded the save you sent me and... it's as though you didn't talk to Eidein at all. So I went to his office, talked to him and everything ran smoothly from there. I'm killing them Faceless right now.
Tested on both debug and release versions.
Pardon my question, but could it be that you forgot to save or accidentally hit a quick load instead of a quick save? Or maybe it's something else entirely. In any case, unless I am missing something, you can simply continue playing the game with this save.