版本：1.13Spigot
插件:GroupManagerPlusV3.0
可以用一些基础指令，比如改默认组颜色/编辑config
不能使用的指令：/mangaddp builder holo.chat
会提示An internal error occurred while attempting to perform this command
--
日志：

[11:24:36] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'mangaddp' in plugin GroupManager v3.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[B8-B-SG-20181216-1.13.jar:git-Spigot-fe3ab0d-162bda9]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[B8-B-SG-20181216-1.13.jar:git-Spigot-fe3ab0d-162bda9]
        at org.bukkit.craftbukkit.v1_13_R1.CraftServer.dispatchCommand(CraftServer.java:694) ~[B8-B-SG-20181216-1.13.jar:git-Spigot-fe3ab0d-162bda9]
        at net.minecraft.server.v1_13_R1.PlayerConnection.handleCommand(PlayerConnection.java:1634) ~[B8-B-SG-20181216-1.13.jar:git-Spigot-fe3ab0d-162bda9]
        at net.minecraft.server.v1_13_R1.PlayerConnection.a(PlayerConnection.java:1469) ~[B8-B-SG-20181216-1.13.jar:git-Spigot-fe3ab0d-162bda9]
        at net.minecraft.server.v1_13_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) ~[B8-B-SG-20181216-1.13.jar:git-Spigot-fe3ab0d-162bda9]
        at net.minecraft.server.v1_13_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) ~[B8-B-SG-20181216-1.13.jar:git-Spigot-fe3ab0d-162bda9]
        at net.minecraft.server.v1_13_R1.PlayerConnectionUtils.a(SourceFile:10) ~[B8-B-SG-20181216-1.13.jar:git-Spigot-fe3ab0d-162bda9]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_191]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_191]
        at net.minecraft.server.v1_13_R1.SystemUtils.a(SourceFile:198) [B8-B-SG-20181216-1.13.jar:git-Spigot-fe3ab0d-162bda9]
        at net.minecraft.server.v1_13_R1.MinecraftServer.w(MinecraftServer.java:884) [B8-B-SG-20181216-1.13.jar:git-Spigot-fe3ab0d-162bda9]
        at net.minecraft.server.v1_13_R1.DedicatedServer.w(DedicatedServer.java:411) [B8-B-SG-20181216-1.13.jar:git-Spigot-fe3ab0d-162bda9]
        at net.minecraft.server.v1_13_R1.MinecraftServer.v(MinecraftServer.java:819) [B8-B-SG-20181216-1.13.jar:git-Spigot-fe3ab0d-162bda9]
        at net.minecraft.server.v1_13_R1.MinecraftServer.run(MinecraftServer.java:717) [B8-B-SG-20181216-1.13.jar:git-Spigot-fe3ab0d-162bda9]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_191]
Caused by: java.lang.NullPointerException
        at org.anjocaido.groupmanager.GroupManager.onCommand(????.java:37045) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[B8-B-SG-20181216-1.13.jar:git-Spigot-fe3ab0d-162bda9]
        ... 15 more

建议使用 luckperms ，你这个报错看上去是插件自己的问题。

https://pluginscdtribe.github.io/wiki/luckperms/

去 spigot 下载

可以试试GMPlus的旧版本
不过还是LP吼233