Templatetags throw nullreference exception from module (Dynamicweb.Frontend.Content)

Hi,

We have a project where attempting to use TemplateTags() to display all available templatetags gives us an error in the frontend:

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

System.NullReferenceException: Object reference not set to an instance of an object.
   at Dynamicweb.Ecommerce.Products.ProductService.ReFactorProductList(ICollection`1 products, Currency currency, Country country, StockLocation stockLocation, User user, Boolean useAssortments)
   at Dynamicweb.Ecommerce.Products.ProductService.GetRelatedCountFrontend(Product product, Currency currency, Country country, StockLocation stockLocation, User user)
   at Dynamicweb.Ecommerce.Frontend.Renderer.GetRelatedCount(Product product, Boolean isFrontend, RenderingContext renderingContext)
   at Dynamicweb.Ecommerce.Frontend.Renderer.RenderProduct(Product product, Boolean extendedProperties, Template template, Int32 loopCounter, Boolean renderRelated, String productUrl, Int32 quantity, Int32 wishListId, Boolean renderPublicList, Boolean isRecursiveCall, Lazy`1 categoryFieldSorting, Int32 orderLineOfProductCount, RenderingContext renderingContext, String unitId)
   at Dynamicweb.Ecommerce.Frontend.Renderer.RenderProducts(ProductCollection products, Template parentTemplate, String loopName, Int32 loopCounter, Boolean renderRelatedProducts, Boolean renderRelatedLists, Boolean isRecursive, RenderingContext renderingContext)
   at Dynamicweb.Ecommerce.Frontend.Renderer.RenderProductRelatedGroups(RenderingContext renderingContext, 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, Boolean isRecursiveCall, Lazy`1 categoryFieldSorting, Int32 orderLineOfProductCount, RenderingContext renderingContext, String unitId)
   at Dynamicweb.Ecommerce.Frontend.Renderer.RenderProduct(Product product, Boolean extendedProperties, String unitId)
   at Dynamicweb.Ecommerce.Frontend.Frontend.EcomRender()
   at Dynamicweb.Ecommerce.Frontend.Frontend.GetContent()
   at Dynamicweb.Frontend.Content.GetModuleOutput(Paragraph paragraph, PageView pageview)

It's running on DW 9.10 and Rapido 3.4.2. The issue has been present for 6+ months (since before I joined the project)

We can't seem to fix it ourselves and was wondering if anyone else has encountered this before, and what the fix might be?

Sincerely,

Frederik Rossen

Developer forum

Templatetags throw nullreference exception from module (Dynamicweb.Frontend.Content)

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

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