Помогите Could not pass event PlayerChatEvent to AChatSystem v3.5, не знаю почему

[13:29:54 ERROR]: Could not pass event PlayerChatEvent to AChatSystem v3.5
java.lang.NoSuchMethodError: org/bukkit/Bukkit.getOnlinePlayers()[Lorg/bukkit/entity/Player; (loaded from file:/home/container/cache/patched_1.12.2.jar by sun.misc.Launcher$AppClassLoader@ffe62544) called from class ru.jampire.uralchat.ChatListener (loaded from file:/home/container/plugins/AChatSystem.jar by org.bukkit.plugin.java.PluginClassLoader@becb3fe4).
at ru.jampire.uralchat.ChatListener.onPlayerChat(ChatListener.java:112) ~[?:?]
at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor165.execute(Unknown Source) ~[?:?]
at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:70) ~[patched_1.12.2.jar:git-Paper-1618]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78) ~[patched_1.12.2.jar:git-Paper-1618]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[patched_1.12.2.jar:git-Paper-1618]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:513) ~[patched_1.12.2.jar:git-Paper-1618]
at net.minecraft.server.v1_12_R1.PlayerConnection$8.evaluate(PlayerConnection.java:1416) ~[patched_1.12.2.jar:git-Paper-1618]
at org.bukkit.craftbukkit.v1_12_R1.util.Waitable.run(Waitable.java:24) ~[patched_1.12.2.jar:git-Paper-1618]
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:861) ~[patched_1.12.2.jar:git-Paper-1618]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423) ~[patched_1.12.2.jar:git-Paper-1618]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774) ~[patched_1.12.2.jar:git-Paper-1618]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666) ~[patched_1.12.2.jar:git-Paper-1618]
at java.lang.Thread.run(Thread.java:823) [?:1.8.0_282]

 

Он не может получить онлайн игроков, плагин в инете не нашёл. Какая версия ядра используется? (/ver)