Type of bug

Error in console

/ess dump all output

https://essentialsx.net/dump.html?id=e459163dd5054a779f6d0d953e87ecc9

Error log (if applicable)

https://logpaste.com/1y5NUSWJ

Bug description

error on execute /kill command in dev build essentials.

Steps to reproduce

install:
Server: 1.20.4-R0.1-SNAPSHOT git-Purpur-2141 (MC: 1.20.4)
EssentialsX : 2.21.0-dev+42-8a57856
LuckPerms: 5.4.117
Vault: 1.7.3-b131
PlaceholderAPI: 2.11.5
EssentialsXSpawn: 2.21.0-dev+42-8a57856
and execute /kill

Expected behaviour

kill player

Actual behaviour

player not die and essentialsx say error in console

This should be fixed in the latest version of Paper. Since you're using Purpur you might need to wait a bit longer for them.