[11:40:43] [Async Chat Thread - #1/ERROR]: Could not pass event AsyncPlayerChatEvent to TownyChat v0.71
java.util.ConcurrentModificationException: null
    at java.util.HashMap$HashIterator.nextNode(HashMap.java:1493) ~[?:?]
    at java.util.HashMap$KeyIterator.next(HashMap.java:1516) ~[?:?]
    at com.palmergames.bukkit.TownyChat.channels.StandardChannel.sendSpyMessage(StandardChannel.java:293) ~[?:?]
    at com.palmergames.bukkit.TownyChat.channels.StandardChannel.chatProcess(StandardChannel.java:186) ~[?:?]
    at com.palmergames.bukkit.TownyChat.listener.TownyChatPlayerListener.onPlayerChat(TownyChatPlayerListener.java:153) ~[?:?]
    at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor1198.execute(Unknown Source) ~[?:?]
    at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69) ~[patched_1.15.2.jar:git-Paper-348]
    at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:76) ~[patched_1.15.2.jar:git-Paper-348]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[patched_1.15.2.jar:git-Paper-348]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:607) ~[patched_1.15.2.jar:git-Paper-348]
    at net.minecraft.server.v1_15_R1.PlayerConnection.chat(PlayerConnection.java:1774) ~[patched_1.15.2.jar:git-Paper-348]
    at net.minecraft.server.v1_15_R1.PlayerConnection.a(PlayerConnection.java:1689) ~[patched_1.15.2.jar:git-Paper-348]
    at net.minecraft.server.v1_15_R1.PacketPlayInChat$1.run(PacketPlayInChat.java:41) ~[patched_1.15.2.jar:git-Paper-348]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[?:?]
    at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]
    at java.lang.Thread.run(Thread.java:834) [?:?]