CratesPlus Errors

[19:23:31] [Server thread/INFO]: FlatoutDude issued server command: /crate
[19:23:31] [Server thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.NullPointerException
	at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_181]
	at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_181]
	at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:47) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:850) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_181]
Caused by: java.lang.NullPointerException
	at gyurix.spigotlib.SU.error(SU.java:138) ~[?:?]
	at gyurix.commands.CustomCommandMap.dispatch(CustomCommandMap.java:97) ~[?:?]
	at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:685) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1479) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1284) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:5) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at net.minecraft.server.v1_12_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:14) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_181]
	at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_181]
	at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	... 5 more