Developer forum

When trying to query the products endpoint by ID (ex: /dwapi/ecommerce/products/PROD560), I consistently get the following error. Has anyone seen this before? This is on 9.12.0.0, we have a default currency set in the backend so I don't think this is _actually_ an issue with resolving that value, not really sure where else to look.
 

{
  "Message": "An error has occurred.",
  "ExceptionMessage": "The 'ObjectContent`1' type failed to serialize the response body for content type 'application/json; charset=utf-8'.",
  "ExceptionType": "System.InvalidOperationException",
  "StackTrace": null,
  "InnerException": {
    "Message": "An error has occurred.",
    "ExceptionMessage": "Error getting value from 'Price' on 'Dynamicweb.Ecommerce.ProductCatalog.ProductViewModel'.",
    "ExceptionType": "Newtonsoft.Json.JsonSerializationException",
    "StackTrace": "   at Newtonsoft.Json.Serialization.DynamicValueProvider.GetValue(Object target)\r\n   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.CalculatePropertyValues(JsonWriter writer, Object value, JsonContainerContract contract, JsonProperty member, JsonProperty property, JsonContract& memberContract, Object& memberValue)\r\n   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType)\r\n   at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType)\r\n   at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding)\r\n   at System.Net.Http.Formatting.JsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding)\r\n   at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStreamAsync(Type type, Object value, Stream writeStream, HttpContent content, TransportContext transportContext, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.WebHost.HttpControllerHandler.<WriteBufferedResponseContentAsync>d__1b.MoveNext()",
    "InnerException": {
      "Message": "An error has occurred.",
      "ExceptionMessage": "Value cannot be null.\r\nParameter name: key",
      "ExceptionType": "System.ArgumentNullException",
      "StackTrace": "   at System.Collections.Concurrent.ConcurrentDictionary`2.TryGetValue(TKey key, TValue& value)\r\n   at Dynamicweb.Caching.DictionaryCache`2.GetCacheResult(IEnumerable`1 keys)\r\n   at Dynamicweb.Caching.ServiceCache`2.GetCache(IEnumerable`1 keys)\r\n   at Dynamicweb.Caching.ServiceCache`2.GetCache(TKey key)\r\n   at Dynamicweb.Ecommerce.ProductCatalog.ViewSettingsBaseCurrencyBase`1.GetCurrency()\r\n   at Dynamicweb.Ecommerce.ProductCatalog.ViewSettingsBaseCurrencyBase`1.GetPriceContext()\r\n   at Dynamicweb.Ecommerce.ProductCatalog.ViewEngine.<>c__DisplayClass0_1.<BulkCreateView>b__34()\r\n   at System.Lazy`1.CreateValue()\r\n   at System.Lazy`1.LazyInitValue()\r\n   at Dynamicweb.Ecommerce.ProductCatalog.ViewEngine.<>c__DisplayClass0_2.<BulkCreateView>b__37()\r\n   at System.Lazy`1.CreateValue()\r\n   at System.Lazy`1.LazyInitValue()\r\n   at Dynamicweb.Ecommerce.ProductCatalog.ViewEngine.<>c__DisplayClass0_2.<BulkCreateView>b__38()\r\n   at System.Lazy`1.CreateValue()\r\n   at System.Lazy`1.LazyInitValue()\r\n   at GetPrice(Object )\r\n   at Newtonsoft.Json.Serialization.DynamicValueProvider.GetValue(Object target)"
    }
  }
}