Posting since the one posted recently by someone else received a "fixed" response. Patch 1.02 fixed the previous vix crash. There is now a new vix crash post patch. It occurs after the fight, after unlocking brawl, before final cutscene. Due to this we cannot finish a current smith run, nor unlock further prestige levels for his story. To clarify: patch 1.02 did NOT fix this bug. This is a different crash from the previous one, which was indeed fixed.
-select the final dialogue option.