That shouldn't be required, and isn't turned on in my test project where I was trying to duplicate your crash.
I'm glad it's working for you now, though. Let me know if you have any other issues.
Thank you!
I have run into another issue. Two attacks are occurring despite the off hand having no weapon equipped, having a main weapon and a shield equipped or when wielding a two handed weapon. This second attack with a main+shield equipped has no animation.
The Barehanded Attack parameter doesn't change any of this for me.