PC Sealed Gates Crash

I was playing through the game and got to the battle with Plutonia and after winning, the game crashed. The video played and I was taken back to the game but then the game blacked out and I had to restart. On restart I started right where I was when the battle ended, but I can’t get into the gate.

I have seen a couple other people say they are having this issue, but no responses. Is there a fix for this or do I have to restart the game? I was expecting auto saves to take me through the game as I hadn’t had this problem until the end.