[18:00:46] [Server thread/INFO]: Schaumgummi issued server command: /is trust Keksmonster2015
[18:00:46] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'is' in plugin uSkyBlock v2.7.2
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) ~[spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at org.bukkit.craftbukkit.v1_10_R1.CraftServer.dispatchCommand(CraftServer.java:646) ~[spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at net.minecraft.server.v1_10_R1.PlayerConnection.handleCommand(PlayerConnection.java:1351) [spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at net.minecraft.server.v1_10_R1.PlayerConnection.a(PlayerConnection.java:1186) [spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at net.minecraft.server.v1_10_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_74]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_74]
	at net.minecraft.server.v1_10_R1.SystemUtils.a(SourceFile:45) [spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at net.minecraft.server.v1_10_R1.MinecraftServer.D(MinecraftServer.java:732) [spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:400) [spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:668) [spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:567) [spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_74]
Caused by: java.lang.IllegalArgumentException: Name cannot be null
	at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at org.bukkit.craftbukkit.v1_10_R1.CraftServer.getPlayer(CraftServer.java:408) ~[spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at org.bukkit.Bukkit.getPlayer(Bukkit.java:384) ~[spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	at us.talabrek.ultimateskyblock.island.IslandInfo.sendMessageToIslandGroup(IslandInfo.java:457) ~[?:?]
	at us.talabrek.ultimateskyblock.command.island.TrustCommand.doExecute(TrustCommand.java:48) ~[?:?]
	at us.talabrek.ultimateskyblock.command.island.RequireIslandCommand.doExecute(RequireIslandCommand.java:43) ~[?:?]
	at us.talabrek.ultimateskyblock.command.island.RequirePlayerCommand.execute(RequirePlayerCommand.java:32) ~[?:?]
	at us.talabrek.ultimateskyblock.utils.command.CompositeCommand.execute(CompositeCommand.java:123) ~[?:?]
	at us.talabrek.ultimateskyblock.utils.command.AbstractCommandExecutor.onCommand(AbstractCommandExecutor.java:38) ~[?:?]
	at us.talabrek.ultimateskyblock.command.IslandCommand.onCommand(IslandCommand.java:88) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot-1.10.2_31.07.jar:git-Spigot-90f61bc-83a9dbd]
	... 15 more