ERROR

[21:00:42 ERROR]: Could not pass event PlayerJoinEvent to KitPvP v1.0
org.bukkit.event.EventException: null
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:298) ~[craftbukkit-1.12.2.jar:git-Bukkit-e60fc34]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit-1.12.2.jar:git-Bukkit-e60fc34]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:499) [craftbukkit-1.12.2.jar:git-Bukkit-e60fc34]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:484) [craftbukkit-1.12.2.jar:git-Bukkit-e60fc34]
        at net.minecraft.server.v1_12_R1.PlayerList.onPlayerJoin(PlayerList.java:330) [craftbukkit-1.12.2.jar:git-Bukkit-e60fc34]
        at net.minecraft.server.v1_12_R1.PlayerList.a(PlayerList.java:151) [craftbukkit-1.12.2.jar:git-Bukkit-e60fc34]
        at net.minecraft.server.v1_12_R1.LoginListener.b(LoginListener.java:131) [craftbukkit-1.12.2.jar:git-Bukkit-e60fc34]
        at net.minecraft.server.v1_12_R1.LoginListener.e(LoginListener.java:57) [craftbukkit-1.12.2.jar:git-Bukkit-e60fc34]
        at net.minecraft.server.v1_12_R1.NetworkManager.a(NetworkManager.java:224) [craftbukkit-1.12.2.jar:git-Bukkit-e60fc34]
        at net.minecraft.server.v1_12_R1.ServerConnection.c(SourceFile:187) [craftbukkit-1.12.2.jar:git-Bukkit-e60fc34]
        at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:768) [craftbukkit-1.12.2.jar:git-Bukkit-e60fc34]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:371) [craftbukkit-1.12.2.jar:git-Bukkit-e60fc34]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:651) [craftbukkit-1.12.2.jar:git-Bukkit-e60fc34]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:555) [craftbukkit-1.12.2.jar:git-Bukkit-e60fc34]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_211]
Caused by: java.lang.NullPointerException
        at com.yakovliam.kitpvp.Managers.ConfigHandler.setDefaults(ConfigHandler.java:54) ~[?:?]
        at com.yakovliam.kitpvp.Managers.PlayerDataCreator.setup(PlayerDataCreator.java:29) ~[?:?]
        at com.yakovliam.kitpvp.Events.Join.Join(Join.java:21) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_211]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_211]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_211]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_211]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:296) ~[craftbukkit-1.12.2.jar:git-Bukkit-e60fc34]
        ... 14 more