ProQuests Error

[18:36:51 ERROR]: Could not pass event PlayerInteractEntityEvent to ProQuests v2.1.0.2-beta
org.bukkit.event.EventException: null
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:308) ~[spigot-1.13.1.jar:git-Spigot-f823ac5-c1ecaa2]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.13.1.jar:git-Spigot-f823ac5-c1ecaa2]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:500) ~[spigot-1.13.1.jar:git-Spigot-f823ac5-c1ecaa2]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:485) ~[spigot-1.13.1.jar:git-Spigot-f823ac5-c1ecaa2]
        at net.minecraft.server.v1_13_R2.PlayerConnection.a(PlayerConnection.java:1826) ~[spigot-1.13.1.jar:git-Spigot-f823ac5-c1ecaa2]
        at net.minecraft.server.v1_13_R2.PacketPlayInUseEntity.a(SourceFile:69) ~[spigot-1.13.1.jar:git-Spigot-f823ac5-c1ecaa2]
        at net.minecraft.server.v1_13_R2.PacketPlayInUseEntity.a(SourceFile:13) ~[spigot-1.13.1.jar:git-Spigot-f823ac5-c1ecaa2]
        at net.minecraft.server.v1_13_R2.PlayerConnectionUtils.a(SourceFile:10) ~[spigot-1.13.1.jar:git-Spigot-f823ac5-c1ecaa2]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_181]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_181]
        at net.minecraft.server.v1_13_R2.SystemUtils.a(SourceFile:199) [spigot-1.13.1.jar:git-Spigot-f823ac5-c1ecaa2]
        at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:900) [spigot-1.13.1.jar:git-Spigot-f823ac5-c1ecaa2]
        at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:417) [spigot-1.13.1.jar:git-Spigot-f823ac5-c1ecaa2]
        at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:835) [spigot-1.13.1.jar:git-Spigot-f823ac5-c1ecaa2]
        at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:733) [spigot-1.13.1.jar:git-Spigot-f823ac5-c1ecaa2]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_181]
Caused by: java.lang.Error: Unresolved compilation problems:
        The method getHand() is undefined for the type PlayerInteractEntityEvent
        OFF_HAND cannot be resolved or is not a field

        at com.culleystudios.proquests.listeners.EntityInteract.onInteract(EntityInteract.java:53) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_181]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_181]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_181]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_181]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:304) ~[spigot-1.13.1.jar:git-Spigot-f823ac5-c1ecaa2]
        ... 15 more