RPC Error in OnProjectileAttackError

Interesting plugin is being used well in my server.

 

But there are some problems.

Multiple zonemanager settings are not available.

Only one zone can be designated, so it needs to be updated so that multiple can be designated.
Also, if the current bradely and patrol heli are destroyed by this plugin, users are kicked from the server due to an RPC error.

05:14 [Info] [Death Notes] Syrup Sipper blew up the Bradley APC with their .05:14 [Warning] Calling 'OnPlayerAttack' on 'FireArrows v1.2.11' took 145m

This is the only error that I get in my logs above happens even if you shoot the arrow at a water catcher, Blow up bradley or heli among other things