[22:50:21 FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
	at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_77]
	at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_77]
	at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:47) [spigot-1.11.2.jar:git-Spigot-7d78b81-f9e0440]
	at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:739) [spigot-1.11.2.jar:git-Spigot-7d78b81-f9e0440]
	at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [spigot-1.11.2.jar:git-Spigot-7d78b81-f9e0440]
	at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:675) [spigot-1.11.2.jar:git-Spigot-7d78b81-f9e0440]
	at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:574) [spigot-1.11.2.jar:git-Spigot-7d78b81-f9e0440]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_77]
Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
	at java.util.ArrayList.rangeCheck(ArrayList.java:653) ~[?:1.8.0_77]
	at java.util.ArrayList.get(ArrayList.java:429) ~[?:1.8.0_77]
	at net.minecraft.server.v1_11_R1.Container.getSlot(Container.java:110) ~[spigot-1.11.2.jar:git-Spigot-7d78b81-f9e0440]
	at net.minecraft.server.v1_11_R1.PlayerConnection.a(PlayerConnection.java:1669) ~[spigot-1.11.2.jar:git-Spigot-7d78b81-f9e0440]
	at net.minecraft.server.v1_11_R1.PacketPlayInWindowClick.a(SourceFile:33) ~[spigot-1.11.2.jar:git-Spigot-7d78b81-f9e0440]
	at net.minecraft.server.v1_11_R1.PacketPlayInWindowClick.a(SourceFile:10) ~[spigot-1.11.2.jar:git-Spigot-7d78b81-f9e0440]
	at net.minecraft.server.v1_11_R1.PlayerConnectionUtils$1.run(SourceFile:13) ~[spigot-1.11.2.jar:git-Spigot-7d78b81-f9e0440]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_77]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_77]
	at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:46) ~[spigot-1.11.2.jar:git-Spigot-7d78b81-f9e0440]
	... 5 more