FullJoinVIP - ERROR

[21:03:07] [Server thread/ERROR]: Could not pass event PlayerLoginEvent to FullJoinVip v1.4
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~c.jar:git-Spigot-7228328-11323bf]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~c.jar:git-Spigot-7228328-11323bf]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:499) c.jar:git-Spigot-7228328-11323bf]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:484) c.jar:git-Spigot-7228328-11323bf]
at net.minecraft.server.v1_12_R1.PlayerList.attemptLogin(PlayerList.java:519) c.jar:git-Spigot-7228328-11323bf]
at net.minecraft.server.v1_12_R1.LoginListener.b(LoginListener.java:133) c.jar:git-Spigot-7228328-11323bf]
at net.minecraft.server.v1_12_R1.LoginListener.e(LoginListener.java:57) c.jar:git-Spigot-7228328-11323bf]
at net.minecraft.server.v1_12_R1.NetworkManager.a(NetworkManager.java:233) c.jar:git-Spigot-7228328-11323bf]
at net.minecraft.server.v1_12_R1.ServerConnection.c(ServerConnection.java:140) c.jar:git-Spigot-7228328-11323bf]
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:842) c.jar:git-Spigot-7228328-11323bf]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:405) c.jar:git-Spigot-7228328-11323bf]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:678) c.jar:git-Spigot-7228328-11323bf]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:576) c.jar:git-Spigot-7228328-11323bf]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_66]
Caused by: java.lang.NoSuchMethodError: org.bukkit.Bukkit.getOnlinePlayers()[Lorg/bukkit/entity/Player;
at com.bernatixer.FullJoinVip.onLogin(FullJoinVip.java:75) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_66]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_66]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_66]
at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_66]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~c.jar:git-Spigot-7228328-11323bf]
... 13 more

Mam na serwerze FullJoinVIP.