HI! Is it possible to have a placeholderAPI for elo? I would like to put his Elo level on the player's board

[20:33:18 ERROR]: [ModernPluginLoadingStrategy] Could not load plugin 'PvPElo.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: Unsupported API version 1.2
at org.bukkit.craftbukkit.v1_19_R3.util.CraftMagicNumbers.checkSupported(CraftMagicNumbers.java:382) ~[paper-1.19.4.jar:git-Paper-550]
at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:119) ~[paper-1.19.4.jar:git-Paper-550]
at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:35) ~[paper-1.19.4.jar:git-Paper-550]
at io.papermc.paper.plugin.entrypoint.strategy.modern.ModernPluginLoadingStrategy.loadProviders(ModernPluginLoadingStrategy.java:116) ~[paper-1.19.4.jar:git-Paper-550]
at io.papermc.paper.plugin.storage.SimpleProviderStorage.enter(SimpleProviderStorage.java:39) ~[paper-1.19.4.jar:git-Paper-550]
at io.papermc.paper.plugin.entrypoint.LaunchEntryPointHandler.enter(LaunchEntryPointHandler.java:36) ~[paper-1.19.4.jar:git-Paper-550]
at org.bukkit.craftbukkit.v1_19_R3.CraftServer.loadPlugins(CraftServer.java:431) ~[paper-1.19.4.jar:git-Paper-550]
at org.bukkit.craftbukkit.v1_19_R3.CraftServer.reload(CraftServer.java:1037) ~[paper-1.19.4.jar:git-Paper-550]
at org.bukkit.Bukkit.reload(Bukkit.java:952) ~[paper-api-1.19.4-R0.1-SNAPSHOT.jar:?]
at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:54) ~[paper-api-1.19.4-R0.1-SNAPSHOT.jar:?]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:155) ~[paper-api-1.19.4-R0.1-SNAPSHOT.jar:?]
at org.bukkit.craftbukkit.v1_19_R3.CraftServer.dispatchCommand(CraftServer.java:929) ~[paper-1.19.4.jar:git-Paper-550]
at org.bukkit.craftbukkit.v1_19_R3.CraftServer.dispatchServerCommand(CraftServer.java:892) ~[paper-1.19.4.jar:git-Paper-550]
at net.minecraft.server.dedicated.DedicatedServer.handleConsoleInputs(DedicatedServer.java:501) ~[paper-1.19.4.jar:git-Paper-550]
at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:448) ~[paper-1.19.4.jar:git-Paper-550]
at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1397) ~[paper-1.19.4.jar:git-Paper-550]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1174) ~[paper-1.19.4.jar:git-Paper-550]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:320) ~[paper-1.19.4.jar:git-Paper-550]
at java.lang.Thread.run(Thread.java:1570) ~[?:?]

hi, could you add commands like:
/elo add
/elo set
/elo remove

?

Great plugin,
I would also like to ask you to add a world whitelist system.
pls pls

Please add mySQL support, i love this plugin. If you need help tell me i could help :D