When I try to make, use, or list my warps; I get an error message which says:

An internal error occurred while attempting to perform this command

The message sent to console says:

exception executing command 'warp' in plugin MyWarp v3.0-beta-3+jenkins-b98.git-623f42c
java.lang.IllegalArgumentException: Invalid locale format: lol_US

This issue only occurs on my laptop. When I'm on my PC, it works perfectly.

This was already fixed in 07f5f2e some time ago, please update to the latest devBuild.

The problem was caused by clients using the pirate language.

I wasn't using pirate language...

One of your player's clients returned the locale lol_US which is the pirate language. This of course does not imply that you yourself used the pirate language.

Anyway it should all work fine if you use a current devBuild.