As title says, server crashes every time a player dies. Some of my plugins that i think are causing problem: essentials, vault, and permissionsex.

Log: https://paste.ee/p/Ls0aO

Video: https://drive.google.com/open?id=1BhxMFdhbMGSl6qme1Zn2nRQzuFolzKhv

If you need more information just ask. All help appreciated!