[06:15:38 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'ffa' in plugin FreeForAll v1.4
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[server.jar:git-Light-c982f88]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159) ~[server.jar:git-Light-c982f88]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.dispatchCommand(CraftServer.java:831) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.PlayerConnection.handleCommand(PlayerConnection.java:2263) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.PlayerConnection.c(PlayerConnection.java:2078) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.PlayerConnection.a(PlayerConnection.java:2031) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.PacketPlayInChat.a(PacketPlayInChat.java:49) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.PacketPlayInChat.a(PacketPlayInChat.java:7) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.PlayerConnectionUtils.lambda$ensureMainThread$1(PlayerConnectionUtils.java:55) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.TickTask.run(SourceFile:18) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.MinecraftServer.bb(MinecraftServer.java:1339) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.MinecraftServer.executeNext(MinecraftServer.java:1332) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeAll(IAsyncTaskHandler.java:95) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.MinecraftServer.a(MinecraftServer.java:1469) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1142) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:296) ~[server.jar:git-Light-c982f88]
at java.lang.Thread.run(Thread.java:831) [?:?]
Caused by: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0
at me.gameisntover.freeforall.Commands.GameCommands.onCommand(GameCommands.java:229) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[server.jar:git-Light-c982f88]
... 19 more

[08:10:22 ERROR]: Could not pass event PlayerJoinEvent to FreeForAll v1.4
java.lang.IllegalArgumentException: Name cannot be null
at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[server.jar:git-Light-c982f88]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.getWorld(CraftServer.java:1267) ~[server.jar:git-Light-c982f88]
at org.bukkit.Bukkit.getWorld(Bukkit.java:629) ~[server.jar:git-Light-c982f88]
at me.gameisntover.freeforall.Messages.JoinLeave.playerJoin(JoinLeave.java:32) ~[?:?]
at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor147.execute(Unknown Source) ~[?:?]
at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69) ~[server.jar:git-Light-c982f88]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[server.jar:git-Light-c982f88]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[server.jar:git-Light-c982f88]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:624) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.PlayerList.postChunkLoadJoin(PlayerList.java:357) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.PlayerList.lambda$null$1(PlayerList.java:304) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.PlayerConnection.tick(PlayerConnection.java:312) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.NetworkManager.a(NetworkManager.java:592) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.ServerConnection.c(ServerConnection.java:173) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.MinecraftServer.b(MinecraftServer.java:1596) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.DedicatedServer.b(DedicatedServer.java:440) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.MinecraftServer.a(MinecraftServer.java:1416) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1142) ~[server.jar:git-Light-c982f88]
at net.minecraft.server.v1_16_R3.MinecraftServer.lambda


I have that error so far