Forum:Unable to begin final mission

I've encountered a problem, and I've yet to find any listings on the web of others encountering the same issue.

I am not able to begin the final mission at Cronos Station. I respond to Hackett with the "let's go now" option, watch the final nightmare sequence, and talk to EDI, then, as I'm choosing my squadmates and their weapon loadout, the mission failure music begins and I see the game over screen.

Is this a glitch?