Try to use this plugin: https://dev.bukkit.org/projects/aps
Not sure if it works, you'll have to download ProtocalLib also.
Since I used GroupManager, I got some problems.
As you can see, there are 2 prefixes, and this is in every...
# Group inheritance
# Any inherited groups prefixed with a g: are global groups
# and are inherited from the GlobalGroups.yml.
Every time when I make a kit, all it is working! But, if I put a enchantment on a kit (like - 271 1 efficiency:1) it doesn't work....
Separate names with a comma.