[04:17:26] [Server thread/INFO]: JackPlays19 issued server command: /b choose Air
[04:17:26] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'b' in plugin ProjectKorra v1.8.8 for MC 1.13.2+
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-518206a-a5b9c7b]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:139) ~[spigot.jar:git-Spigot-518206a-a5b9c7b]
at org.bukkit.craftbukkit.v1_13_R2.CraftServer.dispatchCommand(CraftServer.java:702) ~[spigot.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.PlayerConnection.handleCommand(PlayerConnection.java:1641) ~[spigot.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.PlayerConnection.a(PlayerConnection.java:1476) ~[spigot.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.PacketPlayInChat.a(PacketPlayInChat.java:45) ~[spigot.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.PacketPlayInChat.a(PacketPlayInChat.java:1) ~[spigot.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.PlayerConnectionUtils.a(SourceFile:10) ~[spigot.jar:git-Spigot-518206a-a5b9c7b]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_151]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_151]
at net.minecraft.server.v1_13_R2.SystemUtils.a(SourceFile:199) [spigot.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:895) [spigot.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:417) [spigot.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:830) [spigot.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:728) [spigot.jar:git-Spigot-518206a-a5b9c7b]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151]
Caused by: java.lang.NullPointerException
at com.projectkorra.projectkorra.command.ChooseCommand.execute(ChooseCommand.java:64) ~[?:?]
at com.projectkorra.projectkorra.command.Commands$1.onCommand(Commands.java:109) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-518206a-a5b9c7b]