Right after activating the purifier, no matter what I choose (FEV+ Myself, Lyons, just myself) I get the ending video, no credits, and the game mentions "Introduction Bink" or something about "If player didn't side with Eden and use the FEV" and a prompt with only "Ok" Clicking that fades to a black screen, which then fades to whatever I saw last before the video. I'll either be laying motionless on the ground in the room or able to see Lyons in the room, and unable to move my character (Even though I can see myself in Third Person w/ Lyons in the room) Then nothing happens, no credits, nothing.
Edit: I wasn't aware custom races needed a mod to fix the ending, problem solved now!