I'll be honest, I've lost a ton of interest in coding this plugin, and I did plan a recode, but I just haven't had enough time to do it, so yeah. Sorry, this plugin isn't being supported for now :/
LifeStolen is another life steal plugin.
I plan to recode almost everything related to this sometime in the future in hopes that it will work with newer versions of Minecraft as, to my knowledge, either some stuff doesn't work with newer versions of Minecraft, or the whole plugin doesn't work with newer versions of Minecraft. Not sure how long I'll be as, for a while now, I haven't had any real motivation to work on this, or anything else. I suggest using this plugin on versions of Minecraft below 1.20.4.
You may edit it and use it for yourself, help me out by submitting Pull Requests with your changes, or using your version for your server but you may not redistribute this project (unless you get my permission), the only exception to this is if it's a hosting service that is showing the plugin based on the official distributions, speaking of, the only official distributions are below
CurseForge: https://www.curseforge.com/minecraft/bukkit-plugins/lifestolen
SpigotMC: https://www.spigotmc.org/resources/lifestolen.99220/
Modrinth: https://modrinth.com/plugin/lifestolen
GitHub Releases: https://github.com/kadotcom/lifestolen/releases/ (RECOMMENDED)
Discord: https://discord.gg/2wNv7MSJaw
bStats page: https://bstats.org/plugin/bukkit/LifeStolen/21036
Wiki: https://kadotcom.gitbook.io/lifestolen