Another review talked about how 1.20.6 doesnt work.. I am having that same issue, and here's the error: (there are no other plugins)

java.lang.ArrayIndexOutOfBoundsException: Index 3 out of bounds for length 3
at KO-1.6.jar/fr.lamdis.ko.KoListerners.<init>(KoListerners.java:36) ~[KO-1.6.jar:?]
at KO-1.6.jar/fr.lamdis.ko.KO.onEnable(KO.java:25) ~[KO-1.6.jar:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:288) ~[paper-api-1.20.6-R0.1-SNAPSHOT.jar:?]
at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.enablePlugin(PaperPluginInstanceManager.java:202) ~[paper-1.20.6.jar:1.20.6-151-a4f0f5c]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.enablePlugin(PaperPluginManagerImpl.java:109) ~[paper-1.20.6.jar:1.20.6-151-a4f0f5c]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:520) ~[paper-api-1.20.6-R0.1-SNAPSHOT.jar:?]
at org.bukkit.craftbukkit.CraftServer.enablePlugin(CraftServer.java:626) ~[paper-1.20.6.jar:1.20.6-151-a4f0f5c]
at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:575) ~[paper-1.20.6.jar:1.20.6-151-a4f0f5c]
at net.minecraft.server.MinecraftServer.loadWorld0(MinecraftServer.java:675) ~[paper-1.20.6.jar:1.20.6-151-a4f0f5c]
at net.minecraft.server.MinecraftServer.loadLevel(MinecraftServer.java:437) ~[paper-1.20.6.jar:1.20.6-151-a4f0f5c]
at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:323) ~[paper-1.20.6.jar:1.20.6-151-a4f0f5c]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1136) ~[paper-1.20.6.jar:1.20.6-151-a4f0f5c]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:323) ~[paper-1.20.6.jar:1.20.6-151-a4f0f5c]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]

Great Plugin, problem is that it doesnt work with NotBounties, the bounty isnt increased when a player is killed by another player, nor is the bounty given to the killer if the victim had one on them.

Hi, thank you for the plugin. It's listed as compatible with 1.20.6, but it actually crashes on enable. Are there any plans to release the source code for this plugin? That way other people could fix and use it even if you stop updating. Thanks.

Hello, please don't you want to add a direct download from spigot? I think it would make it easier for more people to download your plugin and this plugin looks fat interesting. Sorry for the mistakes, but I don't speak English very well

Hi, I would think it would be cool if the Totem of Undying could get you out of KO or not KO you at all. Is that feasible?

Exelente plugin! Te hice una modesta donacion :D, un bug que me apasado al momento de hacer una prueba, es que el codigo no diferencia entre jugador de bedrock y java con el mismo nombre, mi servidor al ser crossplay se diferencian los jugadores de bedrock con un punto "."(Ejemplo: .CraftyLopez) al inicio del nombre. si el jugador de bedrock es atacado y termina en estado K.O el de Java tambien de forma automatica aunque no fuera atacado, se que no es un problema muy importante de arreglar, pero igual te dejo el dato.

Excellent plugin! I made you a modest donation :D, a bug that happened to me when doing a test, is that the code does not differentiate between a bedrock player and a java player with the same name, my server being crossplay differentiates bedrock players with a point "."(Example: .CraftyLopez) at the beginning of the name. If the bedrock player is attacked and ends up in a K.O. state, the Java player also automatically even if he wasn't attacked, I know it's not a very important problem to fix, but I'll still give you the information.

Muy buen plugin, funciona bien en servidor crossplay, un bug que nos a pasado a mi y mis amigos es que al morir dejamos un bloque invisible indestructible, tengo que cambiar a creativo para poder quitarlo del mundo.

Very good plugin, it works well on crossplay server, a bug that happened to me and my friends is that when we die we leave an indestructible invisible block, I have to change to creative to be able to remove it from the world.