[12:12:59 ERROR]: Could not pass event PlayerInteractEvent to MFHoppers v3.14
java.lang.NoClassDefFoundError: org/bukkit/block/ShulkerBox
        at net.squidstudios.mfhoppers.util.MContainer.getOfLocation(MContainer.java:81) ~[?:?]
        at net.squidstudios.mfhoppers.util.MContainer.isContainer(MContainer.java:91) ~[?:?]
        at net.squidstudios.mfhoppers.MFHoppers.lambda$initListeners$9(MFHoppers.java:391) ~[?:?]
        at net.squidstudios.mfhoppers.util.plugin.Events.lambda$listen$0(Events.java:26) ~[?:?]
        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78) ~[Skyblock.jar:git-TacoSpigot-"95870a93"]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[Skyblock.jar:git-TacoSpigot-"95870a93"]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [Skyblock.jar:git-TacoSpigot-"95870a93"]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [Skyblock.jar:git-TacoSpigot-"95870a93"]
        at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:228) [Skyblock.jar:git-TacoSpigot-"95870a93"]
        at net.minecraft.server.v1_8_R3.PlayerInteractManager.interact(PlayerInteractManager.java:463) [Skyblock.jar:git-TacoSpigot-"95870a93"]
        at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:763) [Skyblock.jar:git-TacoSpigot-"95870a93"]
        at net.minecraft.server.v1_8_R3.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:52) [Skyblock.jar:git-TacoSpigot-"95870a93"]
        at net.minecraft.server.v1_8_R3.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:1) [Skyblock.jar:git-TacoSpigot-"95870a93"]
        at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [Skyblock.jar:git-TacoSpigot-"95870a93"]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_221]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_221]
        at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [Skyblock.jar:git-TacoSpigot-"95870a93"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:776) [Skyblock.jar:git-TacoSpigot-"95870a93"]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) [Skyblock.jar:git-TacoSpigot-"95870a93"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:715) [Skyblock.jar:git-TacoSpigot-"95870a93"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:618) [Skyblock.jar:git-TacoSpigot-"95870a93"]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_221]