[19:40:12] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'admin' in plugin AdminMode v1.1.1
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[1.8.jar:git-Spigot-0359393-9a17f01]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[1.8.jar:git-Spigot-0359393-9a17f01]
	at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:641) ~[1.8.jar:git-Spigot-0359393-9a17f01]
	at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1162) [1.8.jar:git-Spigot-0359393-9a17f01]
	at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:997) [1.8.jar:git-Spigot-0359393-9a17f01]
	at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:45) [1.8.jar:git-Spigot-0359393-9a17f01]
	at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:1) [1.8.jar:git-Spigot-0359393-9a17f01]
	at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [1.8.jar:git-Spigot-0359393-9a17f01]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_25]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_25]
	at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [1.8.jar:git-Spigot-0359393-9a17f01]
	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:714) [1.8.jar:git-Spigot-0359393-9a17f01]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [1.8.jar:git-Spigot-0359393-9a17f01]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:653) [1.8.jar:git-Spigot-0359393-9a17f01]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:556) [1.8.jar:git-Spigot-0359393-9a17f01]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_25]
Caused by: java.lang.NoSuchMethodError: org.bukkit.Bukkit.getOnlinePlayers()[Lorg/bukkit/entity/Player;
	at de.djd001.adminmode.Main.vanish(Main.java:131) ~[?:?]
	at de.djd001.adminmode.Main.setVanish(Main.java:119) ~[?:?]
	at de.djd001.adminmode.Main.toggleAdmin(Main.java:91) ~[?:?]
	at de.djd001.adminmode.AdminExecutor.onCommand(AdminExecutor.java:25) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[1.8.jar:git-Spigot-0359393-9a17f01]
	... 15 more