[19:10:24] [Server thread/INFO]: iContent issued server command: /manuadd iContent default world[19:10:24] [Server thread/ERROR]: nullorg.bukkit.command.CommandException: Unhandled exception executing command 'manuadd' in plugin GroupManager vPre2.14.1.3 FINAL (Phoenix) at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) ~[craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:620) ~[craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1106) [craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:966) [craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(SourceFile:37) [craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(SourceFile:9) [craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_141] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_141] at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:673) [craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:335) [craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:629) [craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:537) [craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_141]Caused by: java.lang.IllegalArgumentException: Name cannot be null at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at org.bukkit.craftbukkit.v1_8_R3.CraftServer.getPlayer(CraftServer.java:388) ~[craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at org.bukkit.Bukkit.getPlayer(Bukkit.java:383) ~[craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] at org.anjocaido.groupmanager.data.User.getBukkitPlayer(User.java:319) ~[?:?] at org.anjocaido.groupmanager.data.User.setGroup(User.java:183) ~[?:?] at org.anjocaido.groupmanager.data.User.setGroup(User.java:164) ~[?:?] at org.anjocaido.groupmanager.GroupManager.onCommand(GroupManager.java:551) ~[?:?] at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[craftbukkit-1.8.8-R0.1.jar:git-Bukkit-e1ebe52] ... 15 more