Products for Diets and Nutrition

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

System.NullReferenceException: Object reference not set to an instance of an object.
   at Dynamicweb.eCommerce.Products.Group.get_AllGroupsByLanguageID(String languageID)
   at Dynamicweb.eCommerce.Products.Group.get_GroupByID(String groupID, String languageId, String defaultLanguageId)
   at Dynamicweb.eCommerce.Products.Categories.CategoryCollection._Closure$__272._Lambda$__1102(String key)
   at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
   at Dynamicweb.eCommerce.Products.Categories.CategoryCollection._Closure$__272._Lambda$__1103(String groupId)
   at Dynamicweb.eCommerce.Products.Categories.CategoryCollection._Closure$__273._Lambda$__1106(IEnumerable`1 col, Int32 level)
   at Dynamicweb.eCommerce.Products.Categories.CategoryCollection.GetCategories(IEnumerable`1 groupsIds, Func`2 getCategoryFn, Func`2 getGroupRelationsByChildId, Func`3 createCategoryGroup, Int32 minLevel, Nullable`1 maxLevel)
   at Dynamicweb.eCommerce.Products.Categories.CategoryCollection.GetCategories(IEnumerable`1 groups, Int32 minLevel, Nullable`1 maxLevel, String languageId, String defaultLangId)
   at Dynamicweb.eCommerce.Products.Product.GetCategories()
   at Dynamicweb.eCommerce.Products.Categories.Category.FillValues(Product product)
   at Dynamicweb.eCommerce.Products.Product.GetProductCategoryFieldValue(String productId, String variantId, String languageId, Field field)
   at Dynamicweb.eCommerce.Products.Product.GetCategoryValue(String productId, String variantId, String languageId, String defaultLanguageId, IEnumerable`1 groupIds, String primaryGroupId, Func`5 getProdFieldVal, Func`4 getGroupFieldVal, Field catField, Boolean includeInheritance)
   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.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.RenderVariantCombinations(Product product, Template ParentTemplate, 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.RenderProducts(ProductCollection Products, Template ParentTemplate, String LoopName, Int32 LoopCounter, Boolean renderRelatedProducts, Boolean renderRelatedLists)
   at Dynamicweb.eCommerce.Frontend.Renderer.RenderProducts(ProductCollection Products, Template ParentTemplate)
   at Dynamicweb.eCommerce.Frontend.Renderer.internalRenderProducts(ProductCollection products, Boolean isProductsFromIndex)
   at Dynamicweb.eCommerce.Frontend.Frontend.ListProducts(ProductCollection products, String groupsIdent, Boolean hasBeenSorted)
   at Dynamicweb.eCommerce.Frontend.Frontend.List(String groups)
   at Dynamicweb.eCommerce.Frontend.Frontend.EcomRender()
   at Dynamicweb.eCommerce.Frontend.Frontend.GetContent()
   at Dynamicweb.Frontend.Content.GetModule(DataRow& ParagraphRow)