[19:59:41] [Server thread/ERROR]: Could not pass event BlockBreakEvent to QwickTree v2.2.2
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	at net.minecraft.server.v1_9_R1.PlayerInteractManager.breakBlock(PlayerInteractManager.java:292) [spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	at net.minecraft.server.v1_9_R1.PlayerInteractManager.a(PlayerInteractManager.java:218) [spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	at net.minecraft.server.v1_9_R1.PlayerConnection.a(PlayerConnection.java:846) [spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	at net.minecraft.server.v1_9_R1.PacketPlayInBlockDig.a(SourceFile:40) [spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	at net.minecraft.server.v1_9_R1.PacketPlayInBlockDig.a(SourceFile:10) [spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	at net.minecraft.server.v1_9_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_66]
	at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_66]
	at net.minecraft.server.v1_9_R1.SystemUtils.a(SourceFile:45) [spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:721) [spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:400) [spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:660) [spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:559) [spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_66]
Caused by: java.lang.NoSuchFieldError: SWAMPLAND_MOUNTAINS
	at uk.co.gorbb.qwicktree.chop.ChopAction.getLeafReach(ChopAction.java:432) ~[?:?]
	at uk.co.gorbb.qwicktree.chop.ChopAction.leafSearch(ChopAction.java:234) ~[?:?]
	at uk.co.gorbb.qwicktree.chop.ChopAction.check(ChopAction.java:96) ~[?:?]
	at uk.co.gorbb.qwicktree.chop.ChopAction.go(ChopAction.java:72) ~[?:?]
	at uk.co.gorbb.qwicktree.QTListener.blockEvent(QTListener.java:53) ~[?:?]
	at uk.co.gorbb.qwicktree.QTListener.blockBreakEvent(QTListener.java:26) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor255.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_66]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_66]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-1.9.jar:git-Spigot-a1b8bf3-048849c]
	... 17 more