[14:03:19] [Server thread/ERROR]: Could not pass event PlayerInteractEvent to ItemJoin v4.9
org.bukkit.event.EventException: null
	at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:72) ~[patched_1.12.2.jar:git-Paper-1594]
	at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78) ~[patched_1.12.2.jar:git-Paper-1594]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[patched_1.12.2.jar:git-Paper-1594]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:513) ~[patched_1.12.2.jar:git-Paper-1594]
	at org.bukkit.craftbukkit.v1_12_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:236) ~[patched_1.12.2.jar:git-Paper-1594]
	at org.bukkit.craftbukkit.v1_12_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:203) ~[patched_1.12.2.jar:git-Paper-1594]
	at org.bukkit.craftbukkit.v1_12_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:199) ~[patched_1.12.2.jar:git-Paper-1594]
	at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1035) ~[patched_1.12.2.jar:git-Paper-1594]
	at net.minecraft.server.v1_12_R1.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:26) ~[patched_1.12.2.jar:git-Paper-1594]
	at net.minecraft.server.v1_12_R1.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:5) ~[patched_1.12.2.jar:git-Paper-1594]
	at net.minecraft.server.v1_12_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:14) ~[patched_1.12.2.jar:git-Paper-1594]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_191]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_191]
	at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) ~[patched_1.12.2.jar:git-Paper-1594]
	at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:850) ~[patched_1.12.2.jar:git-Paper-1594]
	at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423) ~[patched_1.12.2.jar:git-Paper-1594]
	at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774) ~[patched_1.12.2.jar:git-Paper-1594]
	at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666) ~[patched_1.12.2.jar:git-Paper-1594]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_191]
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -2
	at java.lang.String.substring(String.java:1931) ~[?:1.8.0_191]
	at me.RockinChaos.itemjoin.handlers.CommandHandler.fetchCommand(CommandHandler.java:149) ~[?:?]
	at me.RockinChaos.itemjoin.handlers.CommandHandler.InitializeCommands(CommandHandler.java:99) ~[?:?]
	at me.RockinChaos.itemjoin.handlers.CommandHandler.chargePlayer(CommandHandler.java:47) ~[?:?]
	at me.RockinChaos.itemjoin.listeners.InteractCmds.setupCommands(InteractCmds.java:68) ~[?:?]
	at me.RockinChaos.itemjoin.listeners.InteractCmds.onInteractCmds(InteractCmds.java:40) ~[?:?]
	at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor300.execute(Unknown Source) ~[?:?]
	at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:70) ~[patched_1.12.2.jar:git-Paper-1594]
	... 18 more