[22:19:49] [Server thread/ERROR] [Sponge/]: Could not pass InteractItemEvent$Secondary$OffHand$Impl to Plugin{id=virtualchest, name=VirtualChest, version=0.3.8, description=A sponge plugin providing virtual chest GUIs for menus., authors=[ustc_zzzz], source=/home/servers/PixelmonReborn/mods/VirtualChest-0.3.8.jar}
java.util.NoSuchElementException: No value present
	at java.util.Optional.get(Optional.java:135) ~[?:1.8.0_121]
	at com.github.ustc_zzzz.virtualchest.VirtualChestPlugin.onInteractItemSecondary(VirtualChestPlugin.java:190) ~[VirtualChestPlugin.class:?]
	at org.spongepowered.common.event.listener.SecondaryListener_VirtualChestPlugin_onInteractItemSecondary143.handle(Unknown Source) ~[?:?]
	at org.spongepowered.common.event.RegisteredListener.handle(RegisteredListener.java:95) ~[RegisteredListener.class:1.10.2-2477-5.2.0-BETA-2698]
	at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:313) ~[SpongeModEventManager.class:1.10.2-2477-5.2.0-BETA-2698]
	at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:342) ~[SpongeModEventManager.class:1.10.2-2477-5.2.0-BETA-2698]
	at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:326) ~[SpongeModEventManager.class:1.10.2-2477-5.2.0-BETA-2698]
	at org.spongepowered.common.SpongeImpl.postEvent(SpongeImpl.java:143) ~[SpongeImpl.class:1.10.2-2477-5.2.0-BETA-2698]
	at org.spongepowered.common.event.SpongeCommonEventFactory.callInteractItemEventSecondary(SpongeCommonEventFactory.java:503) ~[SpongeCommonEventFactory.class:1.10.2-2477-5.2.0-BETA-2698]
	at net.minecraft.network.NetHandlerPlayServer.func_147340_a(NetHandlerPlayServer.java:2375) ~[me.class:?]
	at net.minecraft.network.play.client.CPacketUseEntity.func_148833_a(SourceFile:68) ~[iu.class:?]
	at net.minecraft.network.play.client.CPacketUseEntity.func_148833_a(SourceFile:12) ~[iu.class:?]
	at org.spongepowered.common.network.PacketUtil.lambda$onProcessPacket$0(PacketUtil.java:157) ~[PacketUtil.class:1.10.2-2477-5.2.0-BETA-2698]
	at org.spongepowered.common.event.tracking.CauseTracker.switchToPhase(CauseTracker.java:163) [CauseTracker.class:1.10.2-2477-5.2.0-BETA-2698]
	at org.spongepowered.common.network.PacketUtil.onProcessPacket(PacketUtil.java:156) [PacketUtil.class:1.10.2-2477-5.2.0-BETA-2698]
	at net.minecraft.network.PacketThreadUtil$1.redirect$onProcessPacket$zjj000(SourceFile:539) [fl$1.class:?]
	at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) [fl$1.class:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_121]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_121]
	at net.minecraft.util.Util.func_181617_a(SourceFile:45) [h.class:?]
	at org.spongepowered.common.SpongeImplHooks.onUtilRunTask(SpongeImplHooks.java:239) [SpongeImplHooks.class:1.10.2-2477-5.2.0-BETA-2698]
	at net.minecraft.server.MinecraftServer.redirect$onRun$zhp000(MinecraftServer.java:3948) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:668) [MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387) [ld.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]