Exception: NullReferenceExceotion: Object reference not set to an instance of an object

I was disconnected from a server as some guy was trying to kill me with his arrows. I had a rock and hit him a few times and I just get kicked off the server with that message. This was from Miami 2 of the official server lists. What would’ve caused this error?

I’m not trying to bump this for the same of finding out why this happened. Is there a place to post topics if we find a bug to report?