net.minecraft.util.ReportedException: Ticking block entity
	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:790) ~[MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:688) ~[MinecraftServer.class:?]
	at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:156) ~[IntegratedServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:537) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
Caused by: java.lang.IllegalStateException: @Nonnull method gunn/modcurrency/mod/container/itemhandler/ItemHandlerVendor.insertItem must not return null
	at gunn.modcurrency.mod.container.itemhandler.ItemHandlerVendor.$$$reportNull$$$0(ItemHandlerVendor.java) ~[ItemHandlerVendor.class:?]
	at gunn.modcurrency.mod.container.itemhandler.ItemHandlerVendor.insertItem(ItemHandlerVendor.java:33) ~[ItemHandlerVendor.class:?]
	at net.minecraftforge.items.ItemHandlerHelper.insertItem(ItemHandlerHelper.java:40) ~[ItemHandlerHelper.class:?]
	at net.minecraftforge.items.VanillaInventoryCodeHooks.insertHook(VanillaInventoryCodeHooks.java:129) ~[VanillaInventoryCodeHooks.class:?]
	at net.minecraftforge.items.VanillaInventoryCodeHooks.insertHook(VanillaInventoryCodeHooks.java:107) ~[VanillaInventoryCodeHooks.class:?]
	at net.minecraft.tileentity.TileEntityHopper.transferItemsOut(TileEntityHopper.java:288) ~[TileEntityHopper.class:?]
	at net.minecraft.tileentity.TileEntityHopper.updateHopper(TileEntityHopper.java:236) ~[TileEntityHopper.class:?]
	at net.minecraft.tileentity.TileEntityHopper.update(TileEntityHopper.java:221) ~[TileEntityHopper.class:?]
	at net.minecraft.world.World.updateEntities(World.java:1959) ~[World.class:?]
	at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:650) ~[WorldServer.class:?]
	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:784) ~[MinecraftServer.class:?]
	... 4 more