Error in console

Hi i am getting this in my consol.....

Failed to call hook 'OnItemAddedToContainer' on plugin 'SetupFurnaces v2.1.1' (ArgumentNullException: Value cannot be null.

Parameter name: key)

at System.Collections.Generic.Dictionary`2[TKey,TValue].FindEntry (TKey key) [0x00008] in <4889cca7f3644a7fa341501beb4caacb>:0

at System.Collections.Generic.Dictionary`2[TKey,TValue].ContainsKey (TKey key) [0x00000] in <4889cca7f3644a7fa341501beb4caacb>:0

at Oxide.Plugins.SetupFurnaces.OnItemAddedToContainer (ItemContainer container, Item item) [0x00024] in <384edc779939440a98af6e4f7f000cfe>:0

at Oxide.Plugins.SetupFurnaces.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x000f1] in <384edc779939440a98af6e4f7f000cfe>:0

Changed Status from Pending to Work in Progress

Changed Status from Work in Progress to Closed