[INFO] MexBot issued server command: /mmocore admin class MexBot MAGE

[ERROR] null

org.bukkit.command.CommandException: Unhandled exception executing command 'mmocore' in plugin MMOCore vBeta13

at org.bukkit.command.PluginCommand.execute(PluginCommand.java:48) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]

at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]

at org.bukkit.craftbukkit.v1_13_R2.CraftServer.dispatchCommand(CraftServer.java:704) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]

at net.minecraft.server.v1_13_R2.PlayerConnection.handleCommand(PlayerConnection.java:1621) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]

at net.minecraft.server.v1_13_R2.PlayerConnection.a(PlayerConnection.java:1461) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]

at net.minecraft.server.v1_13_R2.PacketPlayInChat.a(PacketPlayInChat.java:45) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]

at net.minecraft.server.v1_13_R2.PacketPlayInChat.a(PacketPlayInChat.java:1) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]

at net.minecraft.server.v1_13_R2.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:9) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]

at net.minecraft.server.v1_13_R2.PlayerConnectionUtils$$Lambda$2670.00000000CC06E390.run(Unknown Source) ~[?:?]

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_212]

at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_212]

at net.minecraft.server.v1_13_R2.SystemUtils.a(SourceFile:199) [spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]

at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:896) [spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]

at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:417) [spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]

at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:831) [spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]

at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:729) [spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]

at java.lang.Thread.run(Thread.java:813) [?:1.8.0_212]

Caused by: java.lang.NullPointerException

at net.Indyuce.mmocore.api.player.PlayerData.setClass(PlayerData.java:456) ~[?:?]

at net.Indyuce.mmocore.command.rpg.admin.ClassCommandMap.execute(ClassCommandMap.java:43) ~[?:?]

at net.Indyuce.mmocore.command.api.CommandBegin.executeCommand(CommandBegin.java:17) ~[?:?]

at net.Indyuce.mmocore.command.MMOCoreCommand.onCommand(MMOCoreCommand.java:44) ~[?:?]

at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]

... 16 more