[10:09:53] [Server thread/ERROR]: Could not pass event PlayerJoinEvent to ReActions v0.9.9
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot.jar:git-Spigot-d97e08b-880a532]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-d97e08b-880a532]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-d97e08b-880a532]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-d97e08b-880a532]
	at net.minecraft.server.v1_8_R3.PlayerList.onPlayerJoin(PlayerList.java:298) [spigot.jar:git-Spigot-d97e08b-880a532]
	at net.minecraft.server.v1_8_R3.PlayerList.a(PlayerList.java:157) [spigot.jar:git-Spigot-d97e08b-880a532]
	at net.minecraft.server.v1_8_R3.LoginListener.b(LoginListener.java:144) [spigot.jar:git-Spigot-d97e08b-880a532]
	at net.minecraft.server.v1_8_R3.LoginListener.c(LoginListener.java:54) [spigot.jar:git-Spigot-d97e08b-880a532]
	at net.minecraft.server.v1_8_R3.NetworkManager.a(NetworkManager.java:231) [spigot.jar:git-Spigot-d97e08b-880a532]
	at net.minecraft.server.v1_8_R3.ServerConnection.c(ServerConnection.java:148) [spigot.jar:git-Spigot-d97e08b-880a532]
	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:813) [spigot.jar:git-Spigot-d97e08b-880a532]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot.jar:git-Spigot-d97e08b-880a532]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:653) [spigot.jar:git-Spigot-d97e08b-880a532]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:556) [spigot.jar:git-Spigot-d97e08b-880a532]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51]
Caused by: java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429) ~[?:1.8.0_51]
	at java.util.HashMap$KeyIterator.next(HashMap.java:1453) ~[?:1.8.0_51]
	at me.fromgate.reactions.util.waiter.ActionsWaiter.refresh(ActionsWaiter.java:76) ~[?:?]
	at me.fromgate.reactions.RAListener.onPlayerJoin(RAListener.java:323) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor274.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51]
	at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot.jar:git-Spigot-d97e08b-880a532]
	... 14 more