[22:02:35 ERROR]: Could not pass event AsyncPlayerChatEvent to FactionsWeb v1.0
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:305) ~[spigot.jar:git-Spigot-550ebac-7019900]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-550ebac-7019900]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-550ebac-7019900]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:484) [spigot.jar:git-Spigot-550ebac-7019900]
        at net.minecraft.server.v1_8_R1.PlayerConnection.chat(PlayerConnection.java:1036) [spigot.jar:git-Spigot-550ebac-7019900]
        at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:975) [spigot.jar:git-Spigot-550ebac-7019900]
        at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java:26) [spigot.jar:git-Spigot-550ebac-7019900]
        at net.minecraft.server.v1_8_R1.PacketPlayInChat$1.run(PacketPlayInChat.java:47) [spigot.jar:git-Spigot-550ebac-7019900]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_91]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_91]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_91]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_91]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_91]
Caused by: java.lang.IllegalStateException: Asynchronous effect add!
        at org.spigotmc.AsyncCatcher.catchOp(AsyncCatcher.java:14) ~[spigot.jar:git-Spigot-550ebac-7019900]
        at net.minecraft.server.v1_8_R1.EntityLiving.addEffect(EntityLiving.java:577) ~[spigot.jar:git-Spigot-550ebac-7019900]
        at org.bukkit.craftbukkit.v1_8_R1.entity.CraftLivingEntity.addPotionEffect(CraftLivingEntity.java:303) ~[spigot.jar:git-Spigot-550ebac-7019900]
        at org.bukkit.craftbukkit.v1_8_R1.entity.CraftLivingEntity.addPotionEffect(CraftLivingEntity.java:293) ~[spigot.jar:git-Spigot-550ebac-7019900]
        at me.nath.FactionsWeb.onPlayerChat(FactionsWeb.java:208) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_91]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_91]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301) ~[spigot.jar:git-Spigot-550ebac-7019900]