Server ArrayIndex Out Of Bounds Exception

I Logged onto Fillecraft late yesterday and went patrolling around to check for if everything was working right within my faction's territory and some neighboring ally areas and I went through a gate to one of them and got hit by an ArrayIndex Out Of Bounds Exception rather hard.

Server Name: Fillecraft
IP: 23.88.104.64:4242

We're being a bit puzzled in their forum's chat not sure what is going on: https://fillecraft.com/forums/

If anyone has ideas on what it could be it'd be...

Server ArrayIndex Out Of Bounds Exception