Problem/Bug Error: That kit is improperly defined. Contact an adminstrator.

Im making a kit for my crates on my server and when im doing the kit it works fine but when im doing the kit it says "Error: That kit is improperly defined. Contact an adminstrator."

Here is my console: View attachment 29879
Here is my config.yml:
View attachment 29882

 

@Karex_ try setting a durability of 0

 

Dude here's my example
*Just IDName
*Tripwire: 131 ID
*So ez to edit
kits:
warrior:
delay: 3600
items:
- 267 1 sharpness:3 unbreaking:2 knockback:2 fireaspect:1 name:&7[&cWarrior&7]
- 257 1 efficiency:3 unbreaking:2 fortune:1 name:&7[&cWarrior&7]
- 306 1 protection:3 unbreaking:2 name:&7[&cWarriorHelm&7]
- 307 1 protection:3 unbreaking:2 name:&7[&cWarriorArmor&7]
- 308 1 protection:3 unbreaking:2 name:&7[&cWarriorTrixter&7]
- 309 1 protection:3 unbreaking:2 name:&7[&cWarriorBoots&7]
- 297 16 name:&7[&cBread&7]

I Recommend for you

Get ChestCommand Plugin then put a command there if u want players get free crate keys or player buy crate key using points or balances (Note: chestcommand has no duration command yet )