Błąd ChestCommand

[15:10:04 WARN]: [ChestCommands] Task #30 for ChestCommands v3.1.2 generated an exception
java.lang.NoSuchMethodError: org.bukkit.Bukkit.getOnlinePlayers()Ljava/util/Collection;
        at com.gmail.filoghost.chestcommands.task.RefreshMenusTask.run(RefreshMenusTask.java:18) ~[?:?]
        at org.bukkit.craftbukkit.v1_7_R2.scheduler.CraftTask.run(CraftTask.java:53) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3042jnks]
        at org.bukkit.craftbukkit.v1_7_R2.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3042jnks]
        at net.minecraft.server.v1_7_R2.MinecraftServer.v(MinecraftServer.java:590) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3042jnks]
        at net.minecraft.server.v1_7_R2.DedicatedServer.v(DedicatedServer.java:250) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3042jnks]
        at net.minecraft.server.v1_7_R2.MinecraftServer.u(MinecraftServer.java:548) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3042jnks]
        at net.minecraft.server.v1_7_R2.MinecraftServer.run(MinecraftServer.java:459) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3042jnks]
        at net.minecraft.server.v1_7_R2.ThreadServerApplication.run(SourceFile:618) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3042jnks]

Taki błąd cały czas mam w konsoli o co chodzi ? plugin nie współgra z silnikiem ?