[Lottery] Plugin Error

[17:14:09 INFO]: OMGitzFROST issued server command: /lot buy 1
[17:14:09 INFO]: [Lottery] taking 100.0from account
[17:14:09 INFO]: [Lottery] playerno: 2 amount: 200.0
[17:14:09 INFO]: [Lottery] using config store: 0.0
[17:14:09 INFO]: [Lottery] playerno: 2 amount: 200.0
[17:14:09 INFO]: [Lottery] using config store: 0.0
[17:14:09 INFO]: [Lottery] playerno: 2 amount: 200.0
[17:14:09 INFO]: [Lottery] using config store: 0.0
[17:14:09 ERROR]: null
org.bukkit.command.CommandException Unhandled exception executing command 'lot' in plugin Lottery v0.9.4
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot-1.10.2.jar:git-Spigot-1e4dd71-5e5cf84]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) ~[spigot-1.10.2.jar:git-Spigot-1e4dd71-5e5cf84]
        at org.bukkit.craftbukkit.v1_10_R1.CraftServer.dispatchCommand(CraftServer.java:646) ~[spigot-1.10.2.jar:git-Spigot-1e4dd71-5e5cf84]
        at net.minecraft.server.v1_10_R1.PlayerConnection.handleCommand(PlayerConnection.java:1351) [spigot-1.10.2.jar:git-Spigot-1e4dd71-5e5cf84]
        at net.minecraft.server.v1_10_R1.PlayerConnection.a(PlayerConnection.java:1186) [spigot-1.10.2.jar:git-Spigot-1e4dd71-5e5cf84]
        at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot-1.10.2.jar:git-Spigot-1e4dd71-5e5cf84]
        at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot-1.10.2.jar:git-Spigot-1e4dd71-5e5cf84]
        at net.minecraft.server.v1_10_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.10.2.jar:git-Spigot-1e4dd71-5e5cf84]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_72]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_72]
        at net.minecraft.server.v1_10_R1.SystemUtils.a(SourceFile:45) [spigot-1.10.2.jar:git-Spigot-1e4dd71-5e5cf84]
        at net.minecraft.server.v1_10_R1.MinecraftServer.D(MinecraftServer.java:732) [spigot-1.10.2.jar:git-Spigot-1e4dd71-5e5cf84]
        at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:400) [spigot-1.10.2.jar:git-Spigot-1e4dd71-5e5cf84]
        at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:668) [spigot-1.10.2.jar:git-Spigot-1e4dd71-5e5cf84]
        at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:567) [spigot-1.10.2.jar:git-Spigot-1e4dd71-5e5cf84]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_72]
Caused by: java.lang.NoSuchMethodError org.bukkit.Server.getOnlinePlayers()[Lorg/bukkit/entity/Player;
        at net.erbros.lottery.LotteryGame.broadcastMessage(LotteryGame.java:472) ~[?:?]
        at net.erbros.lottery.MainCommandExecutor.commandBuy(MainCommandExecutor.java:271) ~[?:?]
        at net.erbros.lottery.MainCommandExecutor.onCommand(MainCommandExecutor.java:55) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot-1.10.2.jar:git-Spigot-1e4dd71-5e5cf84]
        ... 15 more