Essentials Chat Error

[16:18:30 ERROR]: Could not pass event AsyncPlayerChatEvent to EssentialsChat v2.15.0.1
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[towny.jar:git-Spigot-72c2605-251a5b6]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[towny.jar:git-Spigot-72c2605-251a5b6]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [towny.jar:git-Spigot-72c2605-251a5b6]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:484) [towny.jar:git-Spigot-72c2605-251a5b6]
        at net.minecraft.server.v1_10_R1.PlayerConnection.chat(PlayerConnection.java:1280) [towny.jar:git-Spigot-72c2605-251a5b6]
        at net.minecraft.server.v1_10_R1.PlayerConnection.a(PlayerConnection.java:1218) [towny.jar:git-Spigot-72c2605-251a5b6]
        at net.minecraft.server.v1_10_R1.PacketPlayInChat$1.run(PacketPlayInChat.java:39) [towny.jar:git-Spigot-72c2605-251a5b6]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_181]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_181]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_181]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_181]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_181]
Caused by: java.util.UnknownFormatConversionException: Conversion = 'to'
        at org.bukkit.event.player.AsyncPlayerChatEvent.setFormat(AsyncPlayerChatEvent.java:100) ~[towny.jar:git-Spigot-72c2605-251a5b6]
        at com.earth2me.essentials.chat.EssentialsChatPlayerListenerLowest.onPlayerChat(EssentialsChatPlayerListenerLowest.java:61) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor58.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_181]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_181]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[towny.jar:git-Spigot-72c2605-251a5b6]
        ... 11 more