Mission 2: Dark Secret - Part 5: Tomb (Boss Fight) (Castle Winterstein) | Crash

Hello and Happy New Year!
I recently got to the Tomb boss fight with Olaric on Castle Winterstein, but my game keeps crashing after killing several zombies when I continue through the broken wall in an attempt to fight Olaric. Has anyone else experienced this issue? Can someone fix this, or is there a fix for it? Thank you for your time!