Hi ! Is it possible to repair this nice plugin?

Here is the last error I have:

Error while compiling: CraftUI.cs(2166,44): error CS1061: Type `System.Collections.Generic.LinkedList<ItemCraftTask>' does not contain a definition for `Enqueue' and no extension method `Enqueue' of type `System.Collections.Generic.LinkedList<ItemCraftTask>' could be found. Are you missing an assembly reference?

Thank you for your time