0.7.2 Critical Error while Fighting Kaina

[DestroyerLeroy]

While fighting Kaina I randomly got a critcal error. no idea why or how. I'm playing the steam version of the game, 0.7.2. TypeError: this.owner.party(...).map is not a function at n.value.
Here is the Screenshot.

 

[Upcast Drake]

New patch out that should fix the issue.