Problem/Bug "That kit is improperly defined. Contact an administrator."

Whenever a player tries to claim a kit they are met with this error: "That kit is improperly defined. Contact an administrator." And when they try to use the kit afterwards it's put on cooldown.

Here's my essentials kit config: https://pastebin.com/53rryAk3
Here's my entire essentials config: https://pastebin.com/dmJP8CL2

Anyone know what is causing this issue?

 

Hello! Thanks for your response! Now I noticed that after I updated my essentials plugin a "kits.ylm" file has been created in my essentials folder. I changed line 109 on botch my normal config and my kits.yml config yet it didn't help.

I also noticed that I am recieving this error in the console when trying to use a kit.
For /kit claim I get the following error: [Essentials] Unknown item name: 284:0.
For /kit starter I get the following error: [Essentials] Unknown item name: 274:0.
For /kit hero I get the following error: [Essentials] Unknown item name: 278:0.
For /kit ultra I get the following error: [Essentials] Unknown item name: 257:0.
For /kit platinum I get the following error: [Essentials] Unknown item name: 278:0.
For /kit legendary I get the following error: [Essentials] Unknown item name: 278:0.
For /kit eternal I get the following error: [Essentials] Unknown item name: 278:0.

NOTE: The "Unknown item" is always the first item in the kit listed, I tried removing "284:0" in my config and I was met with the same error still.

SOLVED!
https://www.spigotmc.org/threads/th...contact-an-administrator.358386/#post-3302162

EDIT by Moderator: merged posts, please use the edit button instead of double posting.