[15:56:35 WARN]: java.lang.IllegalArgumentException: Plugin cannot be null
[15:56:35 WARN]:        at org.apache.commons.lang.Validate.notNull(Validate.java:192)
[15:56:35 WARN]:        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.validate(CraftScheduler.java:397)
[15:56:35 WARN]:        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.runTaskTimer(CraftScheduler.java:123)
[15:56:35 WARN]:        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.runTaskLater(CraftScheduler.java:106)
[15:56:35 WARN]:        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.runTask(CraftScheduler.java:89)
[15:56:35 WARN]:        at org.bukkit.scheduler.BukkitRunnable.runTask(BukkitRunnable.java:32)
[15:56:35 WARN]:        at fr.adrawyn.plugins.Vote.vote3(Vote.java:1123)
[15:56:35 WARN]:        at fr.adrawyn.plugins.Vote.InventoryClick(Vote.java:495)
[15:56:35 WARN]:        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[15:56:35 WARN]:        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[15:56:35 WARN]:        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[15:56:35 WARN]:        at java.lang.reflect.Method.invoke(Method.java:498)
[15:56:35 WARN]:        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306)
[15:56:35 WARN]:        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
[15:56:35 WARN]:        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502)
[15:56:35 WARN]:        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487)
[15:56:35 WARN]:        at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1630)
[15:56:35 WARN]:        at net.minecraft.server.v1_8_R3.PacketPlayInWindowClick.a(SourceFile:31)
[15:56:35 WARN]:        at net.minecraft.server.v1_8_R3.PacketPlayInWindowClick.a(SourceFile:9)
[15:56:35 WARN]:        at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13)
[15:56:35 WARN]:        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[15:56:35 WARN]:        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[15:56:35 WARN]:        at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44)
[15:56:35 WARN]:        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715)
[15:56:35 WARN]:        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374)
[15:56:35 WARN]:        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654)
[15:56:35 WARN]:        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557)
[15:56:35 WARN]:        at java.lang.Thread.run(Thread.java:748)
[15:56:37 INFO]: UUID of player MCFire_Blood is daad3d0c-eb7e-3151-a366-03a8dbd968fb
[15:56:37 INFO]: MCFire_Blood[/78.194.133.61:58913] logged in with entity id 917 at ([world]6.5, 95.0, 435.5)