Type of bug

Error in console

/ess dump all output

https://essentialsx.net/dump.html?id=2f89bf4a1014483da667fba1080ad148

Error log (if applicable)

https://paste.gg/p/anonymous/b5923bca6cc7432b9631e429ccfc0ae1

Bug description

When i try to whitelist or op someone from the Discord console using EssentialsDiscord i get this error in the console.

Steps to reproduce

Run /whitelist add <player> or /op <player> in the Discord console

Expected behaviour

The player should be whitelisted or opped

Actual behaviour

The player doesn't get whitelisted or opped and there is an error in the console