12:20:49 [INFO] Tacklezaza issued server command: /countdown 1m restart
12:20:49 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'countdown' in plugin TackleSmilekrub v1.0.1.5
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:192)
        at org.bukkit.craftbukkit.v1_6_R3.CraftServer.dispatchCommand(CraftServer.java:532)
        at net.minecraft.server.v1_6_R3.PlayerConnection.handleCommand(PlayerConnection.java:986)
        at net.minecraft.server.v1_6_R3.PlayerConnection.chat(PlayerConnection.java:897)
        at net.minecraft.server.v1_6_R3.PlayerConnection.a(PlayerConnection.java:838)
        at net.minecraft.server.v1_6_R3.Packet3Chat.handle(SourceFile:49)
        at org.spigotmc.netty.NettyNetworkManager.b(NettyNetworkManager.java:230)
        at net.minecraft.server.v1_6_R3.PlayerConnection.e(PlayerConnection.java:117)
        at net.minecraft.server.v1_6_R3.ServerConnection.b(SourceFile:37)
        at org.spigotmc.netty.NettyServerConnection.b(NettyServerConnection.java:132)
        at net.minecraft.server.v1_6_R3.MinecraftServer.t(MinecraftServer.java:594)
        at net.minecraft.server.v1_6_R3.DedicatedServer.t(DedicatedServer.java:240)
        at net.minecraft.server.v1_6_R3.MinecraftServer.s(MinecraftServer.java:483)
        at net.minecraft.server.v1_6_R3.MinecraftServer.run(MinecraftServer.java:415)
        at net.minecraft.server.v1_6_R3.ThreadServerApplication.run(SourceFile:583)
Caused by: java.lang.NoClassDefFoundError: com/smilekrub/smilekrubserver/commands/admin/Countdowncmd$1
        at com.smilekrub.smilekrubserver.commands.admin.Countdowncmd.onCommand(Countdowncmd.java:56)
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
        ... 15 more