[20:11:32] [User Authenticator #1/INFO]: UUID of player icutum is 73e84369-b1a8-44a4-9982-3ab7d1d3f143
[20:11:32] [Thread-13/INFO]: [Bank] Loading Bank for 73e84369-b1a8-44a4-9982-3ab7d1d3f143 from file
[20:11:32] [Thread-13/INFO]: [Bank] Loaded Bank for 73e84369-b1a8-44a4-9982-3ab7d1d3f143 from file, took 12 ms
[20:11:32] [pool-21-thread-1/INFO]: Creating empty config: /home/lcatania/minecraft/plugins/Essentials/userdata/d9bac2d6-5cd3-35fc-a9d1-b6dda044cfcb.yml
[20:11:32] [Server thread/INFO]: [Server] Welcome player icutum!
[20:11:32] [Server thread/ERROR]: Could not pass event PlayerJoinEvent to CTSNCPlus v8.3
org.bukkit.event.EventException: null
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:500) [spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:485) [spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    at net.minecraft.server.v1_12_R1.PlayerList.onPlayerJoin(PlayerList.java:346) [spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    at net.minecraft.server.v1_12_R1.PlayerList.a(PlayerList.java:166) [spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    at net.minecraft.server.v1_12_R1.LoginListener.b(LoginListener.java:159) [spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    at net.minecraft.server.v1_12_R1.LoginListener.e(LoginListener.java:57) [spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    at net.minecraft.server.v1_12_R1.NetworkManager.a(NetworkManager.java:233) [spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    at net.minecraft.server.v1_12_R1.ServerConnection.c(ServerConnection.java:140) [spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:845) [spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151]
Caused by: java.lang.NullPointerException
    at java.util.EnumSet.typeCheck(EnumSet.java:396) ~[?:1.8.0_151]
    at java.util.RegularEnumSet.add(RegularEnumSet.java:161) ~[?:1.8.0_151]
    at java.util.RegularEnumSet.add(RegularEnumSet.java:36) ~[?:1.8.0_151]
    at org.bukkit.craftbukkit.v1_12_R1.boss.CraftBossBar.addFlag(CraftBossBar.java:106) ~[spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    at de.Herbystar.TTA.NMS_BossBar.createBossBar(NMS_BossBar.java:20) ~[?:?]
    at de.Herbystar.TTA.TTA_Methods.createBossBar(TTA_Methods.java:253) ~[?:?]
    at de.Herbystar.CTSNC.Join.WelcomeSystem_OnJoin.sendOnJoinBossBar(WelcomeSystem_OnJoin.java:48) ~[?:?]
    at de.Herbystar.CTSNCPlus.Events.PlayerJoinEvents.onPlayerJoinEvent(PlayerJoinEvents.java:122) ~[?:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_151]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_151]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_151]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_151]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
    ... 14 more