> [16:36:37 ERROR]: Could not pass event PlayerJoinEvent to AlonsoLevels v1.0-BETA
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[server.jar:git-Spigot-db6de12-18fbb24]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[server.jar:git-Spigot-db6de12-18fbb24]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [server.jar:git-Spigot-db6de12-18fbb24]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.PlayerList.onPlayerJoin(PlayerList.java:298) [server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.PlayerList.a(PlayerList.java:157) [server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.LoginListener.b(LoginListener.java:144) [server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.LoginListener.c(LoginListener.java:54) [server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.NetworkManager.a(NetworkManager.java:231) [server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.ServerConnection.c(ServerConnection.java:148) [server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:814) [server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [server.jar:git-Spigot-db6de12-18fbb24]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]
Caused by: java.lang.NullPointerException
at com.alonsoaliaga.alonsolevels.Main.loadPlayer(Main.java:217) ~[?:?]
at com.alonsoaliaga.alonsolevels.Main.onJoin(Main.java:1219) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_212]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_212]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_212]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_212]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[server.jar:git-Spigot-db6de12-18fbb24]
... 14 more