Type of bug

Other unexpected behaviour

/ess dump all output

https://essentialsx.net/dump.html?id=9299cf603d4a4755b6848c5e0be2269a

Error log (if applicable)

https://pastebin.com/WyXsYiGr

Bug description

Whenever I try to create a kit using the /createkit command in the chat I get "Error: null".

Steps to reproduce

1. Have items in your inventory and run /createkit

Expected behaviour

Creates a kit from the items you have in your inventory.

Actual behaviour

Puts an "Error: null" in the chat and doesn't create a kit.