Console Error

[16:19:22] [Async Chat Thread - #1/ERROR]: Could not pass event AsyncPlayerChatEvent to UltimateKits v2.2.9
org.bukkit.event.EventException: null
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:315) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:508) [spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.PlayerConnection.chat(PlayerConnection.java:1589) [spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.PlayerConnection.a(PlayerConnection.java:1527) [spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.PacketPlayInChat$1.run(PacketPlayInChat.java:41) [spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_191]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_191]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_191]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_191]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_191]
Caused by: java.lang.IllegalStateException: InventoryOpenEvent cannot be triggered asynchronously from another thread.
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:490) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at org.bukkit.craftbukkit.v1_14_R1.event.CraftEventFactory.callInventoryOpenEvent(CraftEventFactory.java:1045) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at org.bukkit.craftbukkit.v1_14_R1.event.CraftEventFactory.callInventoryOpenEvent(CraftEventFactory.java:1031) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at org.bukkit.craftbukkit.v1_14_R1.entity.CraftHumanEntity.openCustomInventory(CraftHumanEntity.java:453) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at org.bukkit.craftbukkit.v1_14_R1.entity.CraftHumanEntity.openInventory(CraftHumanEntity.java:336) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at com.songoda.ultimatekits.utils.SettingsManager.openEditor(SettingsManager.java:198) ~[?:?]
        at com.songoda.ultimatekits.utils.SettingsManager.finishEditing(SettingsManager.java:110) ~[?:?]
        at com.songoda.ultimatekits.utils.SettingsManager.onChat(SettingsManager.java:102) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_191]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_191]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_191]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_191]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:311) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        ... 11 more