EpicSpleef error

[16:51:57] [Server thread/WARN]: [EpicSpleef] Task #5857 for EpicSpleef v0.0.16 generated an exception
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
	at java.util.ArrayList.rangeCheck(ArrayList.java:653) ~[?:1.8.0_45]
	at java.util.ArrayList.get(ArrayList.java:429) ~[?:1.8.0_45]
	at de.oppermann.bastian.spleef.arena.SpleefArena.teleportToArena(SpleefArena.java:151) ~[?:?]
	at de.oppermann.bastian.spleef.arena.SpleefArena.access$500(SpleefArena.java:54) ~[?:?]
	at de.oppermann.bastian.spleef.arena.SpleefArena$2.run(SpleefArena.java:215) ~[?:?]
	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-3ccbe77-a6a57a9]
	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [spigot.jar:git-Spigot-3ccbe77-a6a57a9]
	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:726) [spigot.jar:git-Spigot-3ccbe77-a6a57a9]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:367) [spigot.jar:git-Spigot-3ccbe77-a6a57a9]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:657) [spigot.jar:git-Spigot-3ccbe77-a6a57a9]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:560) [spigot.jar:git-Spigot-3ccbe77-a6a57a9]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_45]