null
org.bukkit.command.CommandException: Unhandled exception executing command 'cr' in plugin CrateReloaded v1.3.32
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-17fce80-25de1e6]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot.jar:git-Spigot-17fce80-25de1e6]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:646) ~[spigot.jar:git-Spigot-17fce80-25de1e6]
        at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1135) [spigot.jar:git-Spigot-17fce80-25de1e6]
        at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:970) [spigot.jar:git-Spigot-17fce80-25de1e6]
        at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot.jar:git-Spigot-17fce80-25de1e6]
        at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot.jar:git-Spigot-17fce80-25de1e6]
        at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [spigot.jar:git-Spigot-17fce80-25de1e6]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_45]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_45]
        at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:60) [spigot.jar:git-Spigot-17fce80-25de1e6]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:718) [spigot.jar:git-Spigot-17fce80-25de1e6]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:368) [spigot.jar:git-Spigot-17fce80-25de1e6]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:657) [spigot.jar:git-Spigot-17fce80-25de1e6]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:560) [spigot.jar:git-Spigot-17fce80-25de1e6]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_45]
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -1
        at java.lang.String.substring(String.java:1948) ~[?:1.8.0_45]
        at cratereloaded.aa.b(Reward.java:206) ~[?:?]
        at cratereloaded.aa.n(Reward.java:186) ~[?:?]
        at cratereloaded.aa.i(Reward.java:115) ~[?:?]
        at cratereloaded.aa.parse(Reward.java:90) ~[?:?]
        at cratereloaded.aa.<init>(Reward.java:38) ~[?:?]
        at cratereloaded.K.a(OptionReward.java:38) ~[?:?]
        at cratereloaded.K.<init>(OptionReward.java:26) ~[?:?]
        at cratereloaded.aC.e(CrateManager.java:259) ~[?:?]
        at cratereloaded.aC.a(CrateManager.java:228) ~[?:?]
        at cratereloaded.aC.bf(CrateManager.java:214) ~[?:?]
        at cratereloaded.aC.initialize(CrateManager.java:45) ~[?:?]
        at cratereloaded.aG.enable(Manager.java:20) ~[?:?]
        at cratereloaded.aG.<init>(Manager.java:13) ~[?:?]
        at cratereloaded.aC.<init>(CrateManager.java:38) ~[?:?]
        at cratereloaded.b.h(CrateReloaded.java:223) ~[?:?]
        at cratereloaded.b.b(CrateReloaded.java:118) ~[?:?]
        at cratereloaded.n.a(Reload.java:24) ~[?:?]
        at cratereloaded.aB.onCommand(CommandManager.java:125) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-17fce80-25de1e6]
        ... 15 more