[18:43:32] [Server thread/ERROR] [Sponge]: Could not pass SendCommandEvent$Impl to Plugin{id=pixelcore, name=ComplexPixelCore, version=1.0, description=Complex's core plugin., source=./mods/ComplexPixelCore.jar}
java.lang.StringIndexOutOfBoundsException: String index out of range: 1
at java.lang.String.substring(String.java:1963) ~[?:1.8.0_202]
at com.MCComplex.PixelCore.Events.AliasesListener.onCommandEvent(AliasesListener.java:25) ~[AliasesListener.class:?]
at org.spongepowered.common.event.listener.SendCommandEventListener_AliasesListener_onCommandEvent439.handle(Unknown Source) ~[?:?]
at org.spongepowered.common.event.RegisteredListener.handle(RegisteredListener.java:95) ~[RegisteredListener.class:1.12.2-2768-7.1.6-RC3616]
at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:383) [SpongeModEventManager.class:1.12.2-2768-7.1.6-RC3616]
at org.spongepowered.mod.event.SpongeModEventManager.extendedPost(SpongeModEventManager.java:443) [SpongeModEventManager.class:1.12.2-2768-7.1.6-RC3616]
at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:404) [SpongeModEventManager.class:1.12.2-2768-7.1.6-RC3616]
at org.spongepowered.common.event.SpongeEventManager.post(SpongeEventManager.java:465) [SpongeEventManager.class:1.12.2-2768-7.1.6-RC3616]
at org.spongepowered.common.command.SpongeCommandManager.process(SpongeCommandManager.java:304) [SpongeCommandManager.class:1.12.2-2768-7.1.6-RC3616]
at net.minecraft.command.ServerCommandManager.func_71556_a(SourceFile:1083) [dh.class:?]
at net.minecraft.network.NetHandlerPlayServer.func_147361_d(NetHandlerPlayServer.java:960) [pa.class:?]
at net.minecraft.network.NetHandlerPlayServer.func_147354_a(NetHandlerPlayServer.java:939) [pa.class:?]
at net.minecraft.network.play.client.CPacketChatMessage.func_148833_a(SourceFile:37) [la.class:?]
at net.minecraft.network.play.client.CPacketChatMessage.func_148833_a(SourceFile:9) [la.class:?]
at org.spongepowered.common.event.tracking.phase.packet.PacketPhaseUtil.onProcessPacket(PacketPhaseUtil.java:193) [PacketPhaseUtil.class:1.12.2-2768-7.1.6-RC3616]
at net.minecraft.network.PacketThreadUtil$1.redirect$onProcessPacket$zlj000(SourceFile:539) [hv$1.class:?]
at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) [hv$1.class:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_202]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_202]
at net.minecraft.util.Util.func_181617_a(SourceFile:46) [h.class:?]
at org.spongepowered.common.SpongeImplHooks.onUtilRunTask(SpongeImplHooks.java:301) [SpongeImplHooks.class:1.12.2-2768-7.1.6-RC3616]
at net.minecraft.server.MinecraftServer.redirect$onRun$zjn000(MinecraftServer.java:3955) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:723) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397) [nz.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_202]