[11:51:40] [Server thread/ERROR]: Could not pass event PlayerInteractEvent to SpawnerGUI v1.9.5
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:303) ~[Spigot.jar:git-Spigot-"a1bbf96"]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[Spigot.jar:git-Spigot-"a1bbf96"]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:509) [Spigot.jar:git-Spigot-"a1bbf96"]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:494) [Spigot.jar:git-Spigot-"a1bbf96"]
	at org.bukkit.craftbukkit.v1_8_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:226) [Spigot.jar:git-Spigot-"a1bbf96"]
	at net.minecraft.server.v1_8_R1.PlayerInteractManager.interact(PlayerInteractManager.java:454) [Spigot.jar:git-Spigot-"a1bbf96"]
	at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:714) [Spigot.jar:git-Spigot-"a1bbf96"]
	at net.minecraft.server.v1_8_R1.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:50) [Spigot.jar:git-Spigot-"a1bbf96"]
	at net.minecraft.server.v1_8_R1.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:80) [Spigot.jar:git-Spigot-"a1bbf96"]
	at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [Spigot.jar:git-Spigot-"a1bbf96"]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.7.0_17]
	at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source) [?:1.7.0_17]
	at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.7.0_17]
	at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:684) [Spigot.jar:git-Spigot-"a1bbf96"]
	at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [Spigot.jar:git-Spigot-"a1bbf96"]
	at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:625) [Spigot.jar:git-Spigot-"a1bbf96"]
	at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:528) [Spigot.jar:git-Spigot-"a1bbf96"]
	at java.lang.Thread.run(Unknown Source) [?:1.7.0_17]
Caused by: java.lang.IncompatibleClassChangeError: Found interface com.sk89q.worldguard.protection.ApplicableRegionSet, but class was expected
	at me.assist.spawnergui.Main.canOpenAtLoc(Main.java:162) ~[?:?]
	at me.assist.spawnergui.EventListener.handleInteract(EventListener.java:57) ~[?:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_17]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_17]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_17]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_17]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:299) ~[Spigot.jar:git-Spigot-"a1bbf96"]
	... 17 more
[11:51:41]