reposting this error because the first one wasn't answered and because it happened to me as well
[05:58:10 ERROR]: Could not pass event AsyncPlayerChatEvent to PerWorldChatPlus v5.1.1 java.util.UnknownFormatConversionException: Conversion = 'p' at org.bukkit.event.player.AsyncPlayerChatEvent.setFormat(AsyncPlayerChatEvent.java:105) ~[patched_1.16.5.jar:git-Paper-584] at com.cloudcraftgaming.perworldchatplus.listeners.ChatListener.onChat(ChatListener.java:30) ~[?:?] at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor40.execute(Unknown Source) ~[?:?] at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69) ~[patched_1.16.5.jar:git-Paper-584] at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:76) ~[patched_1.16.5.jar:git-Paper-584] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[patched_1.16.5.jar:git-Paper-584] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:607) ~[patched_1.16.5.jar:git-Paper-584] at io.papermc.paper.adventure.ChatProcessor.post(ChatProcessor.java:224) ~[patched_1.16.5.jar:git-Paper-584] at io.papermc.paper.adventure.ChatProcessor.processingLegacyFirst(ChatProcessor.java:104) ~[patched_1.16.5.jar:git-Paper-584] at io.papermc.paper.adventure.ChatProcessor.process(ChatProcessor.java:62) ~[patched_1.16.5.jar:git-Paper-584] at net.minecraft.server.v1_16_R3.PlayerConnection.chat(PlayerConnection.java:2085) ~[patched_1.16.5.jar:git-Paper-584] at net.minecraft.server.v1_16_R3.PlayerConnection.c(PlayerConnection.java:2000) ~[patched_1.16.5.jar:git-Paper-584] at net.minecraft.server.v1_16_R3.PlayerConnection.a(PlayerConnection.java:1938) ~[patched_1.16.5.jar:git-Paper-584] at net.minecraft.server.v1_16_R3.PacketPlayInChat$1.run(PacketPlayInChat.java:44) ~[patched_1.16.5.jar:git-Paper-584] at java.util.concurrent.Executors$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$Worker.run(ThreadPoolExecutor.java:628) [?:?] at java.lang.Thread.run(Thread.java:834) [?:?]
reposting this error because the first one wasn't answered and because it happened to me as well
[05:58:10 ERROR]: Could not pass event AsyncPlayerChatEvent to PerWorldChatPlus v5.1.1 java.util.UnknownFormatConversionException: Conversion = 'p' at org.bukkit.event.player.AsyncPlayerChatEvent.setFormat(AsyncPlayerChatEvent.java:105) ~[patched_1.16.5.jar:git-Paper-584] at com.cloudcraftgaming.perworldchatplus.listeners.ChatListener.onChat(ChatListener.java:30) ~[?:?] at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor40.execute(Unknown Source) ~[?:?] at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69) ~[patched_1.16.5.jar:git-Paper-584] at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:76) ~[patched_1.16.5.jar:git-Paper-584] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[patched_1.16.5.jar:git-Paper-584] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:607) ~[patched_1.16.5.jar:git-Paper-584] at io.papermc.paper.adventure.ChatProcessor.post(ChatProcessor.java:224) ~[patched_1.16.5.jar:git-Paper-584] at io.papermc.paper.adventure.ChatProcessor.processingLegacyFirst(ChatProcessor.java:104) ~[patched_1.16.5.jar:git-Paper-584] at io.papermc.paper.adventure.ChatProcessor.process(ChatProcessor.java:62) ~[patched_1.16.5.jar:git-Paper-584] at net.minecraft.server.v1_16_R3.PlayerConnection.chat(PlayerConnection.java:2085) ~[patched_1.16.5.jar:git-Paper-584] at net.minecraft.server.v1_16_R3.PlayerConnection.c(PlayerConnection.java:2000) ~[patched_1.16.5.jar:git-Paper-584] at net.minecraft.server.v1_16_R3.PlayerConnection.a(PlayerConnection.java:1938) ~[patched_1.16.5.jar:git-Paper-584] at net.minecraft.server.v1_16_R3.PacketPlayInChat$1.run(PacketPlayInChat.java:44) ~[patched_1.16.5.jar:git-Paper-584] at java.util.concurrent.Executors$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) [?:?]