#57-335C-YU

An error occured while attaching module (Dynamicweb.Frontend.Content)

System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.Contains[TSource](IEnumerable`1 source, TSource value, IEqualityComparer`1 comparer)
   at Dynamicweb.Content.Caching.Storage.Contains(String key)
   at Dynamicweb.eCommerce.Products.Categories.Field.CachedFields()
   at Dynamicweb.eCommerce.Products.Categories.Field.GetFieldsByCategoryId(String categoryId, String languageId)
   at Dynamicweb.eCommerce.Products.Product.GetCategoryValue(String categoryID, String fieldID, Boolean includeInheritance)
   at Dynamicweb.eCommerce.Frontend.Renderer.GetProductCategoryFieldValue(Product product, String categoryID, Field field)
   at Dynamicweb.eCommerce.Frontend.Renderer.SetFieldsLoopTags(Product product, Category category, Boolean hasLoop, IEnumerable`1 fieldsLoops, Field field)
   at Dynamicweb.eCommerce.Frontend.Renderer.RenderProductCategoryFields(Product product, Category category, Template template, String loopName)
   at Dynamicweb.eCommerce.Frontend.Renderer.RenderProductCategories(Product product, Template template, String loopName)
   at Dynamicweb.eCommerce.Frontend.Renderer.RenderProduct(Product Product, Boolean ExtendedProperties, Template Template, Int32 loopCounter, Boolean renderRelated, String productURL, Int32 quantity, Int32 wishListID, Boolean renderPublicList, Int32 orderLineOfProductCount)
   at Dynamicweb.eCommerce.Frontend.Renderer.RenderProduct(Product Product, Boolean ExtendedProperties, Template Template)
   at Dynamicweb.eCommerce.Frontend.Renderer.RenderProduct(Product Product, Boolean ExtendedProperties, Template Template, Int32 loopCounter, Boolean renderRelated, String productURL, Int32 quantity, Int32 wishListID, Boolean renderPublicList, Int32 orderLineOfProductCount)
   at Dynamicweb.eCommerce.Frontend.Renderer.RenderProduct(Product Product, Boolean ExtendedProperties)
   at Dynamicweb.eCommerce.Frontend.Frontend.EcomRender()
   at Dynamicweb.eCommerce.Frontend.Frontend.GetContent()
   at Dynamicweb.Frontend.Content.GetModule(DataRow& ParagraphRow)