Problem/Bug An internal error occurred while attempting to perform this command

Hello i have a problem. When I try /f home in Wilderness or /f home in Warzone. I will get "An internal error occurred while attempting to perform this command"

I have [Factions 2.7.3], [MassiveCore 2.7.3], CB 1.7.9-R0.2

Console:

[15:07:46 INFO]: Kyjasport issued server command: /f home
[15:07:46 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing 'f home' in com.massivecraft.massivecore.cmd.MassiveCoreBukkitCommand(f)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:184) ~[server.jar:git-Spigot-1483]
at org.bukkit.craftbukkit.v1_7_R3.CraftServer.dispatchCommand(CraftServer.java:726) ~[server.jar:git-Spigot-1483]
at net.minecraft.server.v1_7_R3.PlayerConnection.handleCommand(PlayerConnection.java:999) [server.jar:git-Spigot-1483]
at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java:830) [server.jar:git-Spigot-1483]
at net.minecraft.server.v1_7_R3.PacketPlayInChat.a(PacketPlayInChat.java:28) [server.jar:git-Spigot-1483]
at net.minecraft.server.v1_7_R3.PacketPlayInChat.handle(PacketPlayInChat.java:65) [server.jar:git-Spigot-1483]
at net.minecraft.server.v1_7_R3.NetworkManager.a(NetworkManager.java:180) [server.jar:git-Spigot-1483]
at net.minecraft.server.v1_7_R3.ServerConnection.c(ServerConnection.java:81) [server.jar:git-Spigot-1483]
at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:720) [server.jar:git-Spigot-1483]
at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:283) [server.jar:git-Spigot-1483]
at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:583) [server.jar:git-Spigot-1483]
at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:489) [server.jar:git-Spigot-1483]
at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [server.jar:git-Spigot-1483]
Caused by: java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()Ljava/util/Collection;
at com.massivecraft.factions.cmd.CmdFactionsHome.perform(CmdFactionsHome.java:118) ~[?:?]
at com.massivecraft.massivecore.cmd.MassiveCommand.execute(MassiveCommand.java:327) ~[?:?]
at com.massivecraft.massivecore.cmd.MassiveCommand.execute(MassiveCommand.java:306) ~[?:?]
at com.massivecraft.massivecore.cmd.MassiveCommand.execute(MassiveCommand.java:349) ~[?:?]
at com.massivecraft.massivecore.cmd.MassiveCoreBukkitCommand.execute(MassiveCoreBukkitCommand.java:67) ~[?:?]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:180) ~[server.jar:git-Spigot-1483]
... 12 more