Lootbags not working
after i linked it , it says i has been link but nothing happened after click

PhatLoots ver. 4.1.1
Spigot 1.8.8
Server : Ubuntu server 15
Java : open-jdk8-jre

No stacktrace

When i use lastest PhatLoots
stacktrace say no method Inventory.getItemInHand
that method remove in 1.9 , isn't it?

Use v 4.1.x if you are on spigot 1.8.8

When you link a lootbag, it doesnt tell you it has been linked, which makes me think you have lootbags confused with phatloots.

Phatloot: A loot that can be linked to a chest/dispenser/etc according to config.
Lootbag: A phatloot that is linked to an item/block (like an enderchest item), useable by right clicking.

To create a Lootbag you first need to make a phatloot.
You also need a lore plugin like lores(made by the same guy) to add underlore.

Link to lores: http://dev.bukkit.org/bukkit-plugins/lores/

Then you need to add the name of the phatloot in the underlore which respects the key in the config. .
Config Example:
##Using LootBags may cause lag if you have many items with a lot of lore on the server
LootBags: true
LootBagKey: '&3&0&k'

Finally, you hold the lootbag you want in your hand, and add the lore to the lootbag.
/lore name &aAwesome Treasure
/lore add &a- Right click to Open!
/lore add &3&0&k[phatlootname]

The first lore is optional, I just put it there to show you that if you are making a lootbag, you would want the players to know its a lootbag and how to open it.