Обсудим ProQuest конфликтует с WorldGuard/WorldEdit

Доброго времени суток, столкнулся с проблемой. ProQuest конфликтует с WorldEdit и WorldGuard. Без этих плагинов квесты работают. Проблема заключается в том, что задания работают, но не выполняются, в то время в консоль выдаётся следующая ошибка:

Спойлер: Console

[Server thread/ERROR]: Could not pass event PlayerCommandPreprocessEvent to ProQuests v2.0.3.5
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot.jar:git-Spigot-5f38d38-18fbb24]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-5f38d38-18fbb24]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-5f38d38-18fbb24]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-5f38d38-18fbb24]
at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1154) [spigot.jar:git-Spigot-5f38d38-18fbb24]
at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:997) [spigot.jar:git-Spigot-5f38d38-18fbb24]
at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot.jar:git-Spigot-5f38d38-18fbb24]
at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot.jar:git-Spigot-5f38d38-18fbb24]
at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [spigot.jar:git-Spigot-5f38d38-18fbb24]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_131]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_131]
at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [spigot.jar:git-Spigot-5f38d38-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [spigot.jar:git-Spigot-5f38d38-18fbb24]
at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot.jar:git-Spigot-5f38d38-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot.jar:git-Spigot-5f38d38-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot.jar:git-Spigot-5f38d38-18fbb24]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_131]
Caused by: java.lang.IncompatibleClassChangeError: Found class com.sk89q.worldguard.protection.ApplicableRegionSet, but interface was expected
at com.culleystudios.proquests.util.EligibilityUtil.getAllRegions(EligibilityUtil.java:399) ~[?:?]
at com.culleystudios.proquests.util.EligibilityUtil.isEligble(EligibilityUtil.java:127) ~[?:?]
at com.culleystudios.proquests.quests.internal.CommandQuest.onCommand(CommandQuest.java:273) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_131]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_131]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_131]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_131]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot.jar:git-Spigot-5f38d38-18fbb24]
... 16 more