Factions not working.

I have just found out that my Factions isn't working, I deleted the file but now I can't transfer Factions.jar to FileZilla to put into my plugins.
I have MassiveCore its just factions that doesn't want to work
Please help
My latest Log http://pastebin.com/NgADShqq
NOTE: I have not touched anything in the config files of Factions

 

@JustTotalBacon
You do not need to put the server ip's adress in the server.properties file. Bukkit finds your Ip automatically.

Why are you still on 1.8? That came out three years ago. Please read this thread and update to 1.11.

Also, GAListener was not built for 1.8. You either have to update your server or remove that plugin from your server.

Main problem: You are using an incorrect version. Make sure you are using the same update for both Faction and MassiveCore, that supports your version.