[17:16:25 ERROR]: Could not pass event PlayerJoinEvent to Code v1.0
org.bukkit.event.EventException: null
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:499) [spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:484) [spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at net.minecraft.server.v1_12_R1.PlayerList.onPlayerJoin(PlayerList.java:342) [spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at net.minecraft.server.v1_12_R1.PlayerList.a(PlayerList.java:162) [spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at net.minecraft.server.v1_12_R1.LoginListener.b(LoginListener.java:159) [spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at net.minecraft.server.v1_12_R1.LoginListener.e(LoginListener.java:57) [spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at net.minecraft.server.v1_12_R1.NetworkManager.a(NetworkManager.java:233) [spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at net.minecraft.server.v1_12_R1.ServerConnection.c(ServerConnection.java:140) [spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:842) [spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:405) [spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:678) [spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:576) [spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_131]
Caused by: java.lang.NullPointerException
        at org.bukkit.craftbukkit.v1_12_R1.entity.CraftPlayer.teleport(CraftPlayer.java:498) ~[spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at org.bukkit.craftbukkit.v1_12_R1.entity.CraftEntity.teleport(CraftEntity.java:271) ~[spigot1.12.jar:git-Spigot-0869666-03f1e37]
        at fr.askigh.code.listeners.Listeners.onJoin(Listeners.java:27) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_131]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_131]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_131]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_131]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[spigot1.12.jar:git-Spigot-0869666-03f1e37]
        ... 14 more