Factions wont work.

What does the console say?

The whole log please?

[16:34:30] [Server thread/WARN]: at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:77)
[16:34:30] [Server thread/WARN]: at org.bukkit.plugin.java.JavaPluginLoader.getClassByName(JavaPluginLoader.java:191)
[16:34:30] [Server thread/WARN]: at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:73)
[16:34:30] [Server thread/WARN]: at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62)
[16:34:30] [Server thread/WARN]: at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
[16:34:30] [Server thread/WARN]: at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
[16:34:30] [Server thread/WARN]: at markehme.factionsplus.FactionsPlus.onDisable(FactionsPlus.java:235)
[16:34:30] [Server thread/WARN]: at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:318)
[16:34:30] [Server thread/WARN]: at markehme.factionsplus.FactionsPlusPlugin.disableSelf(FactionsPlusPlugin.java:130)
[16:34:30] [Server thread/WARN]: at markehme.factionsplus.FactionsPlus.onEnable(FactionsPlus.java:213)
[16:34:30] [Server thread/WARN]: at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:316)
[16:34:30] [Server thread/WARN]: at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:324)
[16:34:30] [Server thread/WARN]: at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:404)
[16:34:30] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_7_R3.CraftServer.loadPlugin(CraftServer.java:455)
[16:34:30] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_7_R3.CraftServer.enablePlugins(CraftServer.java:389)
[16:34:30] [Server thread/WARN]: at net.minecraft.server.v1_7_R3.MinecraftServer.n(MinecraftServer.java:352)
[16:34:30] [Server thread/WARN]: at net.minecraft.server.v1_7_R3.MinecraftServer.g(MinecraftServer.java:326)
[16:34:30] [Server thread/WARN]: at net.minecraft.server.v1_7_R3.MinecraftServer.a(MinecraftServer.java:282)
[16:34:31] [Server thread/WARN]: at net.minecraft.server.v1_7_R3.DedicatedServer.init(DedicatedServer.java:182)
[16:34:31] [Server thread/WARN]: at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:436)
[16:34:31] [Server thread/WARN]: at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628)
[16:34:31] [Server thread/WARN]: Caused by: java.lang.ClassNotFoundException: com.massivecraft.factions.cmd.FCommand
[16:34:31] [Server thread/WARN]: at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
[16:34:31] [Server thread/WARN]: at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
[16:34:31] [Server thread/WARN]: at java.security.AccessController.doPrivileged(Native Method)
[16:34:31] [Server thread/WARN]: at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
[16:34:31] [Server thread/WARN]: at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:77)
[16:34:31] [Server thread/WARN]: at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62)
[16:34:31] [Server thread/WARN]: at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
[16:34:31] [Server thread/WARN]: at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
[16:34:31] [Server thread/WARN]: ... 30 more
[16:34:31] [Server thread/INFO]: [FactionsPlus] [WARNING]:
[16:34:31] [Server thread/INFO]: [FactionsPlus] [WARNING]:Did not disable successfuly! Please check above errors.
[16:34:32] [Server thread/INFO]: Server permissions file permissions.yml is empty, ignoring it
[16:34:36] [Server thread/INFO]: Done (32.588s)! For help, type "help" or "?"
[16:34:36] [Server thread/INFO]: Starting GS4 status listener
[16:34:36] [Query Listener #1/INFO]: Query running on 0.0.0.0:53902
[16:34:36] [Server thread/INFO]: [MassiveCore 2.7.4] Loading Cachefile datas...
[16:34:36] [Server thread/INFO]: [MassiveCore 2.7.4] Loading Onlineplayer datas...
[16:34:36] [Server thread/INFO]: [MassiveCore 2.7.4] Loading Registry datas...
[16:34:36] [Server thread/INFO]: [MassiveCore 2.7.4] Loading Dbmojangapi datas...
[16:34:36] [Server thread/INFO]: [MassiveCore 2.7.4] Player Strings Found: 0
[16:34:36] [Server thread/INFO]: [MassiveCore 2.7.4] Player Strings Cached: 0
[16:34:36] [Server thread/INFO]: [MassiveCore 2.7.4] Player Strings Remaining: 0
[16:34:36] [Server thread/INFO]: [MassiveCore 2.7.4] Now fetching the remaining players from Mojang API ...
[16:34:36] [Server thread/INFO]: [MassiveCore 2.7.4] ... done!
[16:34:36] [Server thread/INFO]: [MassiveCore 2.7.4] Saving Cachefile...
[16:34:36] [Server thread/INFO]: [MassiveCore 2.7.4] Upgrading from player name to player uuid...
[16:34:36] [Server thread/INFO]: [MassiveCore 2.7.4] ... done!
[16:34:36] [Server thread/INFO]: [MassiveCore 2.7.4] (database saving will now commence which might lock the server for a while)
>
Here you go sorry I had to make a new account for some reason mine got closed ;=;

Factions plugins dont work on my server too

It's still not the full log.

I just installed Spigot 1.8.7 and both Factions and mcore with the newest version and it works perfectly fine for me.

Make sure everything on your server is up-to-date.

So factions dont run in 1.7.9 RO3 ?

I don't know, I didn't try it with the 1.7, and don't want to, because that version is outdated.

So basicly, the only version of factions that works are 1.11?

Most of the time I would recommend to use the newest version, but you don't have to necessarily.