There is no Bukkit for Minecraft 1.11 (or did I miss something within the last 2 years?)
Make sure you've made the mandatory changes to your Factions configuration: https://www.massivecraft.com/factions-configure#essentialschat
Factions tags are quite easy to set up with EssentialsChat. Read Massivecraft's guide on that:...
Isn't Multicraft parsing the server log in order to determine the online players count? If your log format is ambiguous I could imagine that to be...
If you use Essentials you can set hide-permissionless-help: true in it's config.yml. This will show only permitted commands in /help.
if(inv.getHolder() instanceof Player) { Player holder = (Player) inv.getHolder(); }
Commands and permissions aren't the same thing. Don't give your players the permission for Essentials' /msg command. You should also disable it in...
There a very tiny plugin for that purpose: MRForceSpawn
Some needed memory couldn't be allocated. Doesn't seem like the machine used all of its memory/RAM, but better check that. You might also try to...
What did you write on the sign? Do you have the required permission nodes? (essentials.signs.~~~)
NBT is a file format used by Mojang. Do you mean the inventory editor NEI (Not Enough Items)?
The /f who command is deprecated, currently it's an alias for the "Faction" command:...
Ask a friend if he still has a craftbukkit.jar. The plugins are all still there.
This is for /f player: https://github.com/MassiveCraft/Factions/blob/master/src/com/massivecraft/factions/cmd/CmdFactionsPlayer.java#L47
Put the destination name like "w:B" if B is a world or "p:B" if B is another portal....
Separate names with a comma.